There are a few marks on the side of the barrel but the optical performance is not affected. Standard RMS screw thread. Numerical aperture of 0. Numerical aperture of 1. Becoming a very rare objective these days SOLD Meiji x10 The Japanese microscope manufacturer Meiji have now positioned themselves to be competition for Olympus and Nikon and rightly so. This is a semi- plan, DIN standard objective with a numerical aperture of 0. A collectors piece but also a good lens. PL APO objectives — the class for professionals. They deliver imaging quality that cannot be achieved by conventional objectives. Plan Apochromats provide perfect axial and lateral color matching for applications requiring fast color change and the colocalization of structures.
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It is produced and hosted as another way of expressing gratitude to those who have helped Company Seven prosper. With some of this content dating back to the times when slow dial-up Internet access was the norm, the article was originally text heavy because illustrations were by necessity kept simple and to a minimum. Over the decades we have, and will continue to, on occasion add this or that mention of or illustration of items in our archives and museum collection, this to break up the monotony of text, make corrections with much gratitude to Dr.
Kyowa x A Kyowa x40 achromatic objective – tube length mm with a numerical aperture of The lens optically is in very good condition but there is a little tarnish in the final bezel of the mount.
Establishment by General Electric[ edit ] Company logo in stressed its leadership in international communication. In , the Wireless Telegraph and Signal Company, Limited, was founded in London to promote the radio then known as “wireless telegraphy” inventions of Guglielmo Marconi. As part of a worldwide expansion, in American Marconi was organized as a subsidiary company, holding the rights to use the Marconi patents in the United States and Cuba.
With the entry of the United States into World War One in April , the government took over most civilian radio stations, to use them for the war effort. Although the overall U. Defying instructions to the contrary, the Navy began purchasing large numbers of stations outright. With the conclusion of the conflict, Congress turned down the Navy’s efforts to have peacetime control of the radio industry, and instructed the Navy to make plans to return the commercial stations it controlled, including the ones it had improperly purchased, to the original owners.
May As humans, our environment consistently exposes us to a variety of dangers. Tornadoes, lightning, flooding and hurricanes can all hamper our survival. Not to mention the fact that most of us can encounter swerving cars or ill-intentioned people at any given moment. Biofilms form when bacteria adhere to surfaces in aqueous environments and begin to excrete a slimy, glue-like substance that can anchor them to all kinds of material Thousands of years ago, humans realized that they could better survive a dangerous world if they formed into communities, particularly communities consisting of people with different talents.
Working together in this manner requires communication and cooperation.
Beginning week , the show moved from Wednesday to Monday and changed its theme music. Cast. Host: Normally Garry Moore, but panelists guest-hosted at least three times: Henry Morgan in weeks and and Betsy Palmer in week Panel: Normally Bill Cullen, Betsy, Henry, and Bess Myerson, seated in that was absent the most times, while Henry was absent only on Christmas.
Charles Grenier Production Manager: Leiser This entire episode is viewable on YouTube in three parts: The panel must try to explain everyday natural phenomena in a way the kids can understand. Why does the moon have different shapes? Where does [sic] thunder and lightning come from? Where do mountains come from? Where does rain come from? Ray Hall, Caldwell, NJ: Bill, Betsy, Henry, Jayne Director: Franklin Heller Technical Director: Leiser Jayne and Steve were at the Oscars to present the award won by Manos Hatzidakis, the composer of “Never on Sunday”; but no one showed up to claim it, so Jayne still has it.
Appears both first and last. A scavenger hunt is conducted.
The telescope, complete with the original wood packing crates for the optical tube assembly and German Mount Head, arrived on 18 August from a collector in Belgium. After nearly four weeks of work we completed our illustrated article explaining these telescopes, and now this 4 inch telescope joins our other Unitron telescopes at our on-line virtual museum. The article Unitron Model – 4. Click on image to see enlarged view 64, bytes In time we hope to add some optional accessories for the 4 inch telescope including the Unitron mechanical clock drive, a weight-driven motor based on the mechanics of a clock but geared to rotate the telescope Right Ascension axis about once every 24 hours.
We already have some offers of help to add some other hard-to-find accessories for this telescope, these will be acquired over time for our exhibits. While many other people no doubt have accumulated extensive collections of telescopes, including Unitron and Polarex, we know of no where else where the public is welcome to visit and can be so impressed by the presence of those telescopes that helped to stimulate interest at the beginning of the space age as at Company Seven.
CTS Polarising Microscope. This is a relatively rare Cooke Troughton and Sims polarising microscope that is now a collectors piece. Serial number M with provenance card and original manual together with its original case that is in excellent condition for its age.
Bausch and Henry Lomb. Both men settled in Rochester, New York and began constructing eyeglasses before forming an official partnership and founding the Vulcanite Optical Instrument Company in to produce frames for glasses and magnifiers from hard rubber. By the late s, Bausch’s son Edward had joined the team and the company added microscopes to the growing product lineup.
Gundlach designed a full product line of microscopes and patented a variety of stands and accessories before leaving the company in Providing versatility through an almost unlimited number of positions, the KAJ microscope offers a modicum of comfort via paired eyepieces that may be adjusted to suit the observer. In addition, the Greenough-style microscope forms an erect, apparently three-dimensional image of the specimen.
Winifred and Alice entered the home in January The birth certificate of Alice Maud daughter has been obtained — click here. So far it has not proved possible to locate the other three birth certificates, although attempts continue. It is looking very much as if these three births were not registered. In the census click here they are living at No 55 Queen Street, Marylebone: Arthur’s occupation is now shown as “Accountant” and Alice’s as “Book-keeper”.
HARD HAT DIVING BOOK. Sir Robert Davis, “Deep Diving and Submarine Operations, A Manual for Deep Sea Divers and Compressed Air Workers,” 6th .
Lenses like this do not become available every day. This is a brass finished Beck 4mm Apochromatic objective with a numerical aperture of 0. Standard RMS screw thread and in very good condition. American Optical x10 Price: A relatively rare American made lens in good condition. Infinity corrected with a numerical aperture of 0. This is a Beck 2mm oil immersion objective in good condition.
Brass and black with standard RMS screw thread. Olympus Fluorescence Target Price: In excellent condition this is a set of hardly used Leica M25 screw thread objectives. Infinity corrected C Plan 0. A Prior x10 objective for mm tube length and with a numerical aperture of 0. Gillett and Sibert x Price:
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This is a manuscript of the 3rd edition, a work in progress sponsored by the US National Science Foundation. The first edition was published by Third Millenium Books, Novato, California, in and as noted below, copyright was reassigned to the author upon breakup of that company. As to conditions for use, Dr. Grosch says “make sure it’s as generous as possible. The only restriction I really want is, no alterations, or elisions which change [my] intentions. The only cautions for viewing, other than sheer size, are the presence of several tables, which browsers such as Lynx might not format correctly, and the fact that it contains a fair number of words in German, French, and other languages containing accented characters, coded in ISO Latin Alphabet 1, properly announced.
PREFACE to first edition. THIS BOOK was to be an autobiography. I was made into a computer fifty years ago. I was the second scientist ever hired by IBM, and I watched the Watsons on Olympus, and Bill Norris and Ken Olsen and Gene Amdahl, and a thousand great commercial and academic figures.
This happened so long ago that the records do not definitively disclose who invented the instrument. Hans and Zaccharias Jansen have been given the credit by some historians, but the bulk of the evidence does NOT support this claim. What we do know is that compound microscopes existed in the ‘s and that in Galileo Galilei was using a compound microscope. Some Italian historians credit Galileo with the invention, but there is no real evidence to support this; Galileo was certainly one of the earliest users of both the telescope and compound microscope.
In Cornelius Drebbel was exhibiting a compound microscope in London, with two convex lenses. In Giovanni Faber of Bamberg first coined the term microscope. The details of most of these early compound instruments dating to before the time of Hooke, Campani and Divini, are not well documented; their constructive details, when pictured or discussed, are only derived from incomplete descriptions and poor illustrations.
It is from the middle of the 17th century that good illustrations, and some actual instruments now survive. Among the earliest of these are instruments by Hooke, Divini and Campani. In Robert Hooke published Micrographia, a collection of biological micrographs. He coined the word cell for the structures he discovered in cork bark.
The construction and appearance of his compound microscope is among the earliest of which we have good documentation and good engravings. The earliest extant microscopes also date to the early to mid 17th century. Campani and Divini microscopes are from this era.
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The earlier models were frequently given names. The purpose of this essay is to describe the evolution of one of these models, the top of the line, the Professional model. An example of one of these instruments is shown in figure 1.
Biofilms form when bacteria adhere to surfaces in aqueous environments and begin to excrete a slimy, glue-like substance that can anchor them to all kinds of material.
This is among the last of their sporting optics catalogs published while their products line still resembled those they had made for some decades in the United States. Though soon after the war they and other manufacturers commenced exporting U. Aspects discussed in more detail than in prior editions include: Spotting scopes include the BALscope Sr.
Content scanned from original in our archives in mid resolution and provided by Company Seven as an Adobe pdf reduced size file 7, , bytes. This is available on request only for those of our customers who have made it possible for Company Seven to survive and prosper over the decades. Changes in July By doing this we preserve history, some that may not be particularly important to many today but that in time might become more valued and added to some public museum collection.
This month we scanned and make available: This shows the product line as it was just before the company transitioned to full time war production, this with our and catalogs that we host, helps us to better understand the development of their binoculars over this era. This explains their properties including: This also explains how these are constructed showing their layout, and with illustrated explanations how to select a binocular for the various typical uses.
The document also includes testimonials by naturalists, hunters, and Olympic sports team members.
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Zeiss Antique Brass Microscope This is a fine antique monocular brass microscope in its original case dating from approximately It has no makers name but there are features that attest to its quality. The brass is in good condition for its age. The microscope has two objectives each with its own brass objective pot and ine eyepiece. The stage has a slide holder and very unusually has a dissection plate assembly with tether points that can be attached to the microscope stage.
Condition very good taking into account their obvious age.
Bouverie, Louisa Mary Yeames – – Louisa was born in Deptford, Kent, on 13 June (click here for her baptism record from St Paul, Deptford, Lewisham) and was the only daughter and youngest child of Richard Gowlland (click here for his biography) and Louisa Mary, née Yeames. She married Charles Bouverie on 28 July at St Bride’s, Fleet Street, London (click here for the.
During his life he wrote over 60 articles on these various phenomena and although he did not receive substantial recognition at the time we must say that the interest in Snowflake Bentley and his work still flourishes This Newsletter brings some of that recognition to the forefront with Wayne Howe, The Jericho Historical Society’s Archivast and new National star, after his appearance on CBS Evening News link to video. Wayne talks of this and the other recent press including the article in American Profile linked here and The Burlington Free Press.
We supplied photos and archived material for all these stories. The well edited piece featured Bentley’s beautiful snowflake photographs along with the famous Pathe news video of Bentley at work. Luckily, Jericho was dressed up with the slightest bit of snow when the friendly film crew arrived. Video of a horse drawn sleigh flying over the snow and Bentley’s frosty grave site in Jericho Center set a nice tone.
The Mill now serves as the site of the Bentley Gallery.