PILLISCHER’S UNIQUE “LENTICULAR” DESIGN — A STAGE WITH MICROSCOPE ATTACHED, English, c. 1850, signed “Invented by M. Pillischer, Optician &c, London, No. 136.” Made in very limited numbers, this remarkable 3″ (7.6 cm) long Pillischer design features a spring stage for 1″ x 3″ glass slides. Mounted to this hand-held brass stage are some fairly sophisticated accessories, including wheel of stops, substage concave mirror in yoke on double-jointed arm, swiveling lens holder with precision fine focus control, and two interchangeable high power magnifiers (1/4 inch and a remarkable 1/30). The instrument is very finely machined and constructed of contrasting clear lacquered and chemically toned brass, by the innovative Moritz Pillischer. It is in fine condition throughout although without a case. This very early form of Pillischer¹s work was illustrated and described in 1857 by the famous English physician, Dr. Golding Bird. A serious instrument of maximum portability.
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David and Yola Coffeen both have enjoyed academic careers, as planetary astronomer and as linguist/educator. But since 1982 (yes, 1982!) they have been full-time dealers in early scientific and medical instruments, under the name Tesseract. Selling primarily by catalogue (over 100 issued so far) they also have a web presence at www.etesseract.com, and can be contacted at firstname.lastname@example.org.