288 THE AMEHICAN MONTHLY [Sept. 



LETTERS TO THE EDITOR. 



Dear Doctor : From the present outlook, the " CottoaStatPS 

 and International Exposition " will be one of the " events " in 

 the liistory of our country, and especially of the south. Real- 

 izin*!; the immense number of pliysicians who will be present, 

 from all parts of the United States and other countries, 1 liave 

 decided to offer my mite of Southern hospitality to my visit- 

 ing brethren. Therefore, I extend a cordial invitation to any 

 })]iys'cian who may visit our city, to make my office his head- 

 quarters. Send mail, telegrams, etc., in my care, and I will 

 clieerfully engage rooms, etc., in advance for any one if advised 

 to do so. The only request I make is to enclose postage for 

 letters of inquiry, wliich will be cheerfully answered For any 

 services I may render no fee, conmiission, or any perquisites 

 whatever, will l)e received or expected. 

 Fraternally yours, 



GEORGE BROWN, M. D. 



MICROSCOPICAL APPARATUS. 



Watson & Sons' New Grand Model Van Heurck Mi- 

 croscope. — For some years past we liave had in our advertis- 

 ing columns a notice of the Van Heurck Microscope, manufac- 

 tured by W. Watson & Sons of London. This, for a considerable 

 time, has been their leading instrument for liigh-class work. 

 They have now gone a step in advance and produced a simihir 

 stand of the same pattern, to which they have given the name 

 of the "Grand Model Van Heurck Microscope." Like the ori- 

 ginal Van Huerck, it is built extremely solid, the limb being 

 dovetailed right into the stage bracket so that these two impor- 

 tant parts become as firm as if they were made up in one solid 

 casting. Furtiier, the}^ have provided a complete rotation to the 

 stage and the rectangular stage motions are both on the same 

 center as in Messrs. Powell & Lealand's large stand. The in- 

 strument is considerably larger and more massive than its 

 prototype, the original Van Heurck, the spread of the feet being 

 10 inches, and the height to the optical axis when the micros- 

 cope is set horizontal is 10 inches — the normal vision reading 

 distance. This last-named advantage obviates the necessity for 

 packing the instrument up when using a camera-lucida, etc. 

 Already several of these microscopes have found their way into 

 this countr}' and in our judgment it is a microscope that will 

 satisfy the most exact requirements of the most critical workers. 

 For schools and colleges there will be no duty to ]K\y. Private 

 individuals must pay the duty, which is not included in tlie 

 prices asked b}' Messrs. Watson it Sons. 



