1893.] MICROSCOPICAL JOURNAL. 207 



EDITORIAL. 



Terrace dust. — The interestinj; paper on thi.s subject in the 

 Miueh numhcr, pa^e 72, has been replied to by Mr. Cunningham, 

 on page 205 of tlie present numl)er. Tlie satuple.s wliicli he for- 

 warded we have hastily examined. They bear a striking re.sem- 

 blance to the dust found in Calcutta, but absolute identity of 

 origin cannot be aflirmed at i)resent. We shall be glad to re- 

 ceive some "dust" from Calcutta for comparison with that of 

 Mr. Cunningham. We have forwarded the .samples submitted 

 by him to Calcutta. 



The final assumption would be that the spherules in the dust 

 are " of the earth, earthly," and not of "cosmic origin " as was 

 at first suspected b}- the Calcutta observer. 



MICROSCOPICAL APPARATUS. 



Hicks' New Medical Microscope. — Mr. Jas. J. Hicks, of 

 Hatton Garden, whose name is so indelibly stamped on the 

 philosophical instrument industry, had not been long engaged 

 in the construction of fine microscopes before he introduced a 

 pattern which has already made its mark. The " Medical "' 

 Microscope is expressly designed to provide doctors with a first 

 class microscope at a low figure. It is fitted with a bright solid 

 foot that enables it to stand with exceptional steadiness, and 

 shaking is reduced to an absolute minimum. It possesses two 

 eye-pieces and two specially-constructed ol)jective glasses, of 

 1-6 inch and 1-10 inch; a massive circular brass stage, flat and 

 concave mirrors, that are attached to a revolving arm by a very 

 neat motion, which enables the observer to ))lace them in any 

 position to the right or left of the stage and either above or be- 

 neath it. The microscope has also coarse and fine adjusting 

 screws, stand condenser, live-cage and a pair of tweezers. The 

 instrument as a whole is exceedingly handst)me, and whether 

 placed in the surgery, study, or laboratory, w 11 not fail to at- 

 tract attention and admiration. It is fitted int<i a neat polished 

 mahogany cabinet with lock and key. Though designed si»e- 

 cially formedical use it is equally appropriate forother pursuits 

 or studies. The retail price of this instrument complete is £12 

 ($G0).— 77te Oplician. 



