flPPflRATUS NEEDED. 



Certain apparatus not supplied by the laboratory will be 

 needed by each student in his work, while many things not actually 

 needed will be found very useful and even quite indispensable for a 

 thorough course. 



The laboratory should be supplied with good compound and 

 simple microscopes. The former should have a magnification of 

 from 75-600 diameters, and the latter about 20. 



As regards the most suitable microscope stand, there need be 

 no discussion. The stands of any reliable maker can be used. It is 

 important that the working parts be all accurately adjusted, the 

 pillar provided with a joint for inclination, and the instrument be 

 firm and substantial. The Continental stands of American manu- 

 facture are especially to be recommended, as they are quite compact 

 and can be fitted with the various sub-stage parts with but little 

 alteration. The instrument should be furnished with a nose-piece for 

 the objectives and an ocular micrometer for measurements. For 

 the simple microscope, the ordinary tripod magnifier answers the 

 purpose very well and is useful in teasing material with needles 

 under a low magnification. The laboratory should be provided 

 with some form of a sliding microtome. Well microtomes can be 

 used for many things, but for cutting serial sections or material 

 that has been infiltrated with collodion, a sliding microtome is very 

 desirable. The patterns of several good makers are on the market 

 and can be secured of regular dealers. The large microtomes of 

 Bausch and Lomb, or Reichart are especially to be recommended. 

 They cost forty or fifty dollars but the advantages in their use will 

 well repay the expense. The small student's hand microtome of 



