. Beck microscopes. Microscopes. No. 3891 The scale of the instrument which indicates the thickness of the section is divided into 12 divisions, the vahie 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 a
. Beck microscopes. Microscopes. No. 3891 The scale of the instrument which indicates the thickness of the section is divided into 12 divisions, the vahie 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 1cm. from one end. This end is filled with paraffin wax, which projects about 1cm., 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 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 No. 3891. Orientating object holder with adjustments No. 3892. Orientating object holder, simple pattern No. 3893. Object holder for wood blocks No. 3894. Simple object holder No. 3895. Spare hard wood blocks, 22mm. square ... No. 3896. Spare hard wood blocks, 16mm. x 22mm. No. 3897. Knife, Sheffield make Cathcart microtome. This consists o
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