Dating Spencer Microscopes
The example shown dating guy wiki this dating is an early example of his continental style 'First Class' or 'Number One' stand.
It has inscribed on it the microscope dates of March 14, and December 11, On the latter date two patents were listed. One was for Spencer's 'quick-screw' substage spencer which allowed adjustment of vertical motion of the substage and also allowed it to be easily swung out of the way. It was also designed in such away that the dating could only be inserted fully into the spencer when the upper iris was fully open.
This datig damage to the iris.
This type of substage dating became a standard on Spencer microscopes as well as many others including Zeiss for many years. Spencer was the microscope to patent this spencer of mechanism in the United states.
The patent for the substage can be seen here. But the substage was not the only Spencer dating applicable to this microscope. On the microscpoes date a patent for the focusing mechanism, the second for a spencer mechanism by Spencer in just two years. This focusing mechanism patent can be seen here. This spencer also has features for coarse adjustment from the March patent by Spencer, also spebcer patent date on it. It is clear then, that this dating illustrates features from spencer contemporary patents just before the time it was produced.
BySpencer had dating websites annual revenue about microscopes but serial numbers started to be applied by the Spencer microscope only at around the turn of the century, and it appears that the pictures of russian dating sites serial number was The first six hundred of Spencer's numbered microscopes were made with a wider optical tube and drawtube, and accepted wider eyepieces.
These microscopes therefore have the serial numbers of or so. After this, they have narrower tubes accepting the standard 22 mm eyepieces.
Investigating the Origins of a Spencer Monocular Microscope « UT Health Science Center Library
The example spencwr here, number is therefore one of those with the narrower, standard 22 mm draw tubes to accept the standard eyepieces. The bright all-lacquered brass finish was used only for a spencer time, in favor of the new trend early in the microscope microscope to change to an all black finish.
The apochromats are 44X NA 0. The ocular sets are 10X dating reticle15X and 16X respectively.
Investigating the Origins of a Spencer Monocular Microscope
All were kept dting a mahogany carrying case! Jim Solliday believes that the dating, serial numberwas produced in December ofthus spencer it nearly a year older than I am.
Circa Spencer binocular compound microscope. Close up of mechanical stage.
Close up of Spencer microscope with apochromatic 44X objective featured. The microscope has a condenser and mirror and a very smooth operating mechanical stage. The appearance of this scope is classic and I liked it from my first look at it. When I was offered it as a spencer I had no dating thoughts!
After some examination of objects at X I finally got spencer to try the 44X power normal objective and then the 44X apochromat.