Stricker's Warm stage No. 103.
| No. 104. | Warm stage after Errera, permitting rapid changes from low
to high temperature and vice-versa. It includes 2 vessels for cold and hot water, mounted on tripods, with rubber-tubing etc. | $24.— |
Photo-micrographic Apparatus.
Photo-micrographic Apparatus No. 105.
The method of employing this apparatus and the general technique of photo-micrography are treated of in a separate pamphlet containing also four photo-micrographs taken with this apparatus.
This little work is furnished with each apparatus.