125. =Medium size Sliding Microtome=--Track 32 cm long; automatic feed attachement; wheel and chain motion of knife carrier and fixed specimen clamp--without knife =56.--=
126. =The same=, with knife holder for Jung microtome knives =60.--=
127. =The same=, but without wheel and chain motion =44.--=
[Illustration: Ball and Socket Clamp No. 129. Naples Clamp No. 130.]
131. =The Support-Microtome= has a track 19 cm long. The knife-carrier slides on a double flanged support and is moved by means of a large knob. The motion is smooth and quick. The specimen is held in a clamp supported on two adjustable axes at right angles to each other, thus permitting its adjustment in any position. The specimen carrier is moved vertically by means of a micrometer screw to which a large disc is attached. This disc is graduated, each degree representing a motion of the specimen carrier of 0,005 mm. The price of this microtome with knifeholder No. 139, without box or knife is =34.--=
[Illustration: Support-Microtome No. 131.]
131a. =Small Sliding Microtome=, length of bed 21 cm, heavy knife-carrier, object clamp for specimen 25 mm diam., micrometer screw with disc graduated into 100 degrees, each division representing a motion of 0,005 mm. Price including knifeholder No. 139, without knife =24.--=
[Illustration: Small Sliding Microtome No. 131a.]
=A. Thoma's Model=, plano-concave, with handle adapted for clamping immediately to the knife carrier of the microtome, in box.
132. Length of cutting edge 36 cm =26.50=
=B. Jung's Model=--plano-concave--requires knife-holder No. 139--in box.
136. Length of cutting edge 24 cm =11.25=
139. =Knife-holder= designed for Jung's Microtome knife =4.--=
140. =Freezing apparatus= for Microtomes =8.--=
[Illustration: Freezing apparatus No. 140.]
141. This =Hand Microtome=, shown in the figure above, screws to the edge of the table. The specimen is held in a clamp which may be removed from the instrument, and which is raised by a micrometer screw to which a large disc is attached, the edge of which is milled and graduated, each degree of the graduation representing an elevation of the specimen of 1/100 mm. The knife is manipulated by hand and in cutting slides over two narrow glass plates which serve as a track for it. The length of this track is 7 cm =12.--=