14 



Picro-lithium carmine, Is. 



Bismarck brown, in glycerine, IQd. 



Haematoxylin (Ehrlich's), Is. 4d. 



Iodine stain, Is. 6d. 



Fuchsine (magenta), Is. 6d. 



Methylene blue, Is. 



Indigo carmine, Is. 



Violet gentian, Is. 6d. 



Lithium carmine, Is. 



Eosine (blue shade), Is. 



Double stain (Dr. Gibbes), Is. 2d. 



Spiller's purple, Is. 6d. 



Canada balsam dissolved in benzole, Is. 6d. 



Oil of cloves, 2s. 4d. 



Cedar oil, 2s. 6d. 



F. E. Becker Co. 1886. 



I. MICROTOMES. 



57. Microtome for cutting thin sections of wood. ;is 

 well as other substances, devised by Andrew Pritchard, 

 F.R.S.E., prior to 1835. 



Lrnt by Dr. Urban PriHiarJ. 1876. 



The apparatus is made to be screwed to -the edge of a table, 

 and consists of a flat plate of brass with a well in it, in which a 

 kind of piston moves up and down by a micrometer screw. The 

 wood to be cut is fixed to the piston by a small screw, and as it 

 is raised a knife drawn along the plane surface takes off thin 

 sections. Should the piece of wood be too small to be placed 

 in the triangular chamber, it must be glued to a block of 

 convenient size. 



58. Microtome for freezing small pieces of soft tissues 

 with a view to section cutting. 



Lent by Dr. Urban Pritchard. 1876. 



The apparatus consists of a solid copper cylinder with a 

 wooden handle. The cylinder is immersed in a freezing mix- 

 ture until it has assumed a temperature considerably below freez- 

 ing. It is then removed and wiped dry, and the tissue, soaked 

 in gum, is placed upon its flat end and covered with a thick cap 

 of felt. In a short time it will be frozen hard, and the sections 

 can be cut free hand by an ordinary razor. 



