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Brendel model of a flower head, c. 1900

Brendel paper-mâché model of a schematic flower head system with original label, no. 170b. The flower head (capitulum) consists of short-stalked flowers on a saucer-shaped, flat flower base (receptaculum). The lateral flowers arranged in 13/34 position. The model can be separated into two halves. Another specimen can be found in the Utrecht University Museum (Object no. 0285-123093). Around 1866, Robert Brendel in Breslau (now Wroclaw, Poland) began to commercially copy the flower models of the Silesian pharmacist Carl Leopold Lohmeyer Read More...

Rühmkorff coil by E. Leybold’s Nachfolger, c. 1905

A Rühmkorff’s induction coil with Vrill interrupter. Made by E. Leybolds Nachfolger Coln am Rhein and imported by P.J. Kipp & Zonnen of Delft Holland. All parts are detachable and all connections arevisible. The iron core, the primary and the condenser can be removed and the action of these parts can clearly shown. The Vrill interrupter is a modified platinum contact-breaker with a second spring. The primary circuit can be suddenly broken. Owing tot his prolonged period of contact the Read More...

Cased Paul Waechter Microscope. C. 1880’s

Cased Paul Waechter Microscope.   C. 1880’s and case is stamped with serial number 4808 and also stamped with P. Waechter Berlin.  Accessories include a larger glass disc, a few eyepieces and a few objectives marked 4, 7 and the one on the microscope is marked 9.  Fine focusing seems to work, however, the coarse focusing is assumed to be accomplished by drawing the body tube and attached objectives up and down.   I have not been able to move the Read More...

Antique German botanical model of the flower Lilium by Brendel

German botanical model by Brendel, it’s the Lilium, one of the nicest ones, from the second half of 1800s. In perfect condition, painted papier mâché, original wooden base with the peculiar green label, total eight is ca. 52 cm Read More...

Signed L. Beneche Microscope.

Signed L. Beneche Microscope.  No case or accessories with this microscope other than what is mounted on the item.   The stage is signed:” L. Beneche Berlin”.   This microscope would date to late 1800s.  The coarse and fine focusing work well.  The substage single- sided mirror is in fairly good condition and does swivel when operating either knob. There is a substage mounted rotating diaphragm.  Microscope stands about 5.75” (14.6 cm) tall at minimum height. Read More...

Antique Carl Zeiss Microscope

Antique Carl Zeiss Microscope.  Microscope has no case or accessories other than what is mounted on the microscope.   The microscope is signed Carl Zeiss Jena No 24887.  The microscope was manufactured in the late 1890’s.   Accessories on the microscope are a rotating nosepiece with three objectives.   One is inscribed 7 E. Leitz Wetzlar, one is inscribed C. ZEISS B and the third objective is inscribed E. Leitz 2.  The double-sided plan/concave mirrors are in very good condition.  Coarse focusing Read More...

The Kundt’s tube an acoustical apparatus invented in 1866 by German physicist August Kundt.

Rare and completely original instrument the inlaid mahogany wood base measures 70 cm long  ( look for Kundt,s tube on the internet ) The Kundt’s tube experiment is an acoustical apparatus invented in 1866 by German physicist August Kundt. The goal of this experiment is to measure the speed of sound and show the standing waves. This experience is used to demonstrate longitudinal standing waves, the wavelength and acoustical forces. Will be very well and securely packed sent by registered mail Read More...

Cased Ed Messter Universal Bacteria Microscope

Cased Ed Messter Universal Bacteria Microscope in very good condition.   This microscope is C. 1865 and has only a few accessories which can be seen in one of the images.   The eyepiece turret has 3 eyepieces (1,2,4) and rotates smoothly.   The objective turret has three objectives (Oel I,4,7) and turns smoothly.  The plane/concave mirror is mounted on a slotted swing arm and both sides of the mirror are in great condition.  By loosening a screw, the mirror can move Read More...

Cased E. Leitz Wetzlar Microscope

Cased E. Leitz Wetzlar Microscope.   Microscope is serial numbered 31146 and research places year of manufacture at about 1894.  No accessories other than what is mounted on microscope which includes 3 objectives and eyepiece.    Substage double-sided mirror is in very good condition and both coarse and fine focusing function well.   The base of the microscope is engraved with the following inscription: “E. Leitz Wetzlar New-York 411 W. 59Str No 31146” Substage condenser and mirror slide up and down smoothly Read More...

Cased Ed. Messter Microscope

Cased Ed. Messter Microscope.  Microscope does not have a serial number, but the case has a serial number of 30821 and so is C 1900.    Only accessories, other than what is on microscope appears to be an eyepiece.  Unable to get accessory drawer out to get more details since previous owner put a domes screw (non-flush) that prevents drawer from being slid out all the way.  Coarse focusing rack has some worn teeth which prevents smooth functioning.  Fine focusing Read More...

Nurmberg Lens in Case

A cased Nurmberg lens, eighteenth century in original case, lens diameter two and a half inches, in good condition noting some small scrathes to lens Read More...

Anamorphic projection lenses by ISCO of Göttingen

Pair of anamorphic lenses by ISCO of Göttingen, in original fitted case, circa 1955. ANAMORPHOTIC KIPTAR 2X Serial numbers: 252021 and 252024 Focus scale: 55 feet to INF. This lens expands the horizontal by 2x to give the 3:1 ultra wide aspect ratio.  Case dimensions: 27.5 x 23.5 x 14 cm. Isco (Iosef Schneider Optik) was founded in 1936 in Göttingen, Germany.   Read More...