The scale of the instrument which indicates the thickness of the section is divided into 12 
divisions, the value of each division being -002mm., the total being 024mm. It will cut uniform 
sections of any size required within these limits, and objects up to 12mm. x 20mm. in cross section 
can be dealt with. 
Four types of object holders 
are made, all of which are inter- 
changeable and can be quickly 
mounted on the microtome, being 
held in position by a single clamping 
screw. The simple object holder 
consists of a brass tube with a parti- 
tion inside it about lcm. from one 
end. Thisend is filled with paraffin 
wax, which projects about Icm., 
permitting objects to be attached. 
The object holder for wood blocks 
consists of a brass tube with clamp- 
ing screw and wood block, to which 
NH SED the object is fixed. A large variety 
of specimens can be kept on the 
wood blocks which are supplied, and transferred quickly to the microtome without the necessity of 
making wax joints. 
The simple pattern orientating object holder consists of a brass tube with a cup-shaped end. 
A brass hemisphere fits in this end and can be clamped in any position. The hemisphere is filled 
with paraffin wax on which the object is stuck. 
The orientating object holder with adjustments is very similar to the simple pattern, except 
that screws are provided for adjusting the position of the object. There are two adjusting 
screws, one of which actuates the object about a horizontal axis, the other about a vertical axis. 
No. 3890. Cambridge Rocking microtome complete with simple object holder, simple 
orientating object holder and knife nis ae au ae eo. £6) Loe OF 
No. 3891. Orientating object holder with adjustments... oe oe nae «oo — LO: 09 
No. 3892. Orientating object holder, simple pattern wie sce vas Bas Sve ss deal 
No. 3893. Object holder for wood blocks... est Fa ae wee ae see OH RD OM 
No. 3894. Simple object holder ae Soe ae. sae see * she ee OMe amos 
No. 3895. Spare hard wood blocks, 22mm. square ... sie ne sie perdozen 0 2 Of 
No. 3896. Spare hard wood blocks, 16mm. « 22mm. a BS se peridozen. 20) eZ. 0sl 
No. 3897. Knife, Sheffield make = ae an aoe ieee age ae ea) ae S| 
Cathcart microtome. This consists of a 
central fitting which carries either an ether 
freezing chamber or embedding cell which is 
raised by a fine screw. On either side of the 
fitting are two metal rails and the section is cut 
by sliding a frame containing a razor along these 
rails. The microtome is clamped to the table by 
two clamps. 
No. 3605. For embedding only ... £2 15 6 
No. 3606. For embedding and 
freezing sive ass 3.15 6 
No. 3607. Thickness register See On is6 
No. 3506 
No. 3602. Hand microtome, constructed of solid brass 14 in. diameter with 
well 2in. diameter. Though simple in design, being solidly made, 
considerable accuracy can be obtained. The raising screw has 
approximately 40 threads to the inch a Senet OmltOs 2G 
No. 3432. Razor, flat one side, for use with above ms oe Ree 
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