150 HOW TO SEE WITH THE MICROSCOPE. 



tives, etc. The said letters have met with a prompt 

 response, and, as has before been stated, perhaps no 

 two of these have been alike. In each and every case 

 there has been some dissimilarity of circumstance, or, 

 on the other hand, we have suffered some change in our 

 own views. Be all this as it may, the experience of the 

 last two years enables us to speak more precisely to 

 the point than before, and we now endeavor to respond 

 to the interrogatory *' What shall I procure for an 

 outfit?" 



' There can be no general rule that will apply to all. 

 Let us take the following as a typical letter for con- 

 sideration : 



"DEAR SIR: I have read some of your contribu- 

 tions to the American Journal of Microscopy. . . . 

 I am a physician of ten years' practice ; am located in 

 a town of some ten thousand inhabitants. I am satis- 

 fied that I ought to know enough about microscopy to 

 enable me to examine intelligently urinary deposits, 

 cancerous growths, etc., and to this end do I propose 

 to purchase the necessary equipment. Any informa- 

 tion that you may be pleased to give me, will be with 

 pleasure received," etc. 



Now, I would answer this letter, and did answer it, 

 thus : When you buy a stand get one that you will 

 have no occasion to sell at a ruinous sacrifice. I rec- 

 ommend that you purchase one of the cheap and mod- 

 erate-priced instruments, and, at the same time, one 

 that will do any and all work. Such a stand ought not 

 to cost, with one eye-piece, more than forty-five dollars 



