BAIRD &TATLOCK (LONDON) LTD. 



1643 1644-1649 



1643 T Hand Microtome by Leitz. 



Consists essentially of an iron slide-like frame which is attached to the table by a stout screw clamp. The 

 frame is fitted on top with two narrow glass strips 70 millimetres long, which serve as guides for the knife. The 

 object carriage moves at right angles to this within a V track, and is raised and lowered by a micrometer screw fitted 

 below with a milled head having divided sleeve. 



Each division conforms to an elevation of the object of o.oi millimetre. 



The object slide has attached to it a hollow cylinder with clamping screw for fixing the object clamp and 

 paraffin stage. All parts are enamelled or nickel-plated. 



Price without knife 



1644 T Minot Automatic Rotary Microtome, without knife 



1645 T Ribbon Carrier 



1646 T Object Clamp . . 



1647 1 Object Disc, 25 millimetres 



1648 r Knives, 125 millimetre blade, without handle .. .. .. .. each 



1649 1 Adjustable Knife Block for celloidin 



The Rotary Microtome was designed by Dr. Charles S. Minot, of the Harvard University Medical School. 

 Kiom time to time improvements suggested by continual use and developed by us under Dr. Minot's directions have 

 been added to the original instrument, until now it represents the highest attainment of mechanical excellence and 

 accuracy in this line. It has been strengthened by the addition of a guard for the feed-wheel, which serves to 

 protect it, and which at the same time, presents a very attractive appearance. 



All clamps and milled heads are easily operated and accessibly placed. The slides and working parts are 

 fitted with the utmost nicety, with provision for taking up wear. The fly-wheel is so perfectly balanced that the 

 instrument operates with the utmost smoothness and the least expenditure of energy. 



The object carrier is adjustable in three planes and can be rigidly clamped. The knife is adjustable in three 

 planes to and from the object, from side to side, and the edge of the knife can be tilted with reference to a vertical 

 plane. This last adjustment is secured by means of a carefully-fitted socket, which carries the knife, and which 

 with the knife can be rotated in any position and fastened by set-screws. An adjustable screw for serial ribbons 

 attaches to the knife carrier, if desired. The feed is controlled by an adjustable cam, giving cuts from i to 25 

 microns in steps of one micron, and is absolutely reliable for all these various thicknesses. The impact on the 

 cam is by roller, and both this and the cam are of hardened steel, accurately ground. A great saving of time is 

 effected by the split nut (with handles) and the releasing lever. The carriage may thereby be instantly brought 

 to the beginning position or to any intermediate position and then held. The fly-wheel can be turned either forward 

 or backward and there is no way of damaging the screw even if operated after it has been fed out to the last 

 thread. 



This microtome is regularly supplied with three object discs, to which the objects to be cut can be cemented. 



A clamp for holding specimens mounted upon blocks is furnished at an extra cost. 



We can furnish, also on special order, an object clamp having the sides open and the back closed. This clamp 

 ran be attached by its post in place of the discs and orientated by means of the regular holder. 



An extra knife carrier with adjustable clamp for holding the knife edge at any angle with reference to a hori- 

 zontal plane, for celloidin cutting, is also furnished at an extra cost. This microtome is limited, however, for 

 celloidin work, to objects one-half inch square. 



Dimensions : Length of base 200 mm., height 178 mm. 



The instrument is packed in a strong wooden box with handle. 



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-CROSS STREET HATTOTST GARDEN, E'C 



