APPENDIX. 



THE following notes and remarks will be found useful as 

 a slight guide to the preparation and mounting of objects. 

 The student must not be discouraged at his want of skill if 

 he does not succeed even after three or four attempts ; for, 

 like most things, success conies with patience and practice. 

 The things chiefly required are patience, delicate touch, 

 and good eyesight; if these are combined, success is cer- 

 tain. Delicacy of touch is generally acquired in time; so 

 the want of that need not discourage. The first thing, of 

 course, is the choice of a working microscope. There are so 

 many good makers that it is scarcely necessary to mention 

 any particular name; but, perhaps, the cheapest is Field's 

 (of Birmingham) Prize Microscope ; the cost is three gui- 

 neas; and Students' Microscopes from about 5 are made 

 by the best opticians : for a superior article, as the cost 

 increases, Smith and Beck's Popular Microscope, price 10, 

 will be found a good working instrument. To this micro- 

 scope may be added superior object-glasses &c., if wanted. 

 The better microscopes range from this price up to about 

 .190. The next thing to consider is the apparatus that 

 the student will require for observing and mounting the 

 various structures that may be taken from the vegetable and 

 other kingdoms. Having decided upon the choice of a 



