652 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Simmons, W. J. — Magnification in Photomicrographs, Scl.-G>>ssip, 1888, p. 1G2. 



W ALMS LET, W. H. — Photomicrography and the making of Lantern Slides. 



Anthonu's Phot. Bulletin, XIX. (1888) pp. 231-3. 



(5) Microscopical Optics and Manipulation. 



Blackburn, W. — Diffraction Spectra. 



7'r,iHS. and Ann. Hep. Slanchcstcr Micr. Soc, 1887, pp. 58-GO. 

 Crisp, F. — Micromillimetre. 



[Annouucfiufut of the decision of the Council and Fellows, antr, p. 50.^.] 



Nature, XXXVIII. (1888) p. 221. 

 Nelson, E. M. — 



[Nomenclature of eye-pieces and objectives — Kelation of aperture to power, &c. ; 

 also letters by T. F. S., F. D'Agen, and A. S. Z.] 



En.iL Mo±, XLVII. (1888) pp. 190-1, 216. 

 RoYSTON-PiGOTT, G. W. — Microscopical Advances. XXXVII., XXXVIII. 

 [Kesearches in liigli-i)owcr definition — Attenuated lines, circles and dots.] 



/:«///. MccL, XLVII. (1888) pp. 293 ( 2 figs.), 447 (1 fig.). 

 RiJCKER, A. W. — Micro-millimetre. 



[Reply to I\Ir. Crisp's letter, s^tpra.'] Nature, XXXVIII. (1888) p. 244. 



Salomons, D. — Note on Depth of Focus. 



Journ. and Tra7is. Phot. Soc. Gr. Britain, XII. (1888) pp. 160-5. 



(6] Miscellaneous. 



American Microscopes.*^ — Mr. C. F. Cox in bis inaugural address 

 as President of tlie Now York Microscoi)ical Society, said that it was 

 " not long sinco some professed advocates of the popularization of 

 science went through the form of reading us microscopists out of the 

 general body of scientists, on the ground that we were not entitled to 

 fellowship or encouragement because we were only ' amatem-s ' (that is 

 say, lovers of science), were 'hangers on to the regular scientific army,' 

 were ' universal gatherers,' and were ' undertaking to divide the sciences 

 according to the tools used ; ' and we were spoken of contemptuously as 

 'delighting in a formidable and extensive deal of brass stand.' To 

 most of these charges it was hardly necessary to put in any formal 

 defence, for it was obvious that the animus of the attack upon us was 

 the old-fashioned delusion that there is some kind of merit in doing 

 scientific work with poor appliances. But another phase of this general 

 notion has recently manifested itself in a vigorous onslaught upon 

 American Microscopes, for which, with evident aj^propriateness, the 

 vehicle selected has been the journal which three years ago promulgated 

 the now celebrated bull of excommunication. According to the latest 

 chami^ion of scientific orthodoxy, who declares that he has ' seen and 

 examined a great many difierent stands, and the lenses of many manu- 

 facturers,' 'it is undesirable to recommend a student to purchase any 

 Microscope whatsoever of American manufacture,' but it is desirable 

 ' to always counsel him to obtain, if possible, one of the German or 

 French instruments,' which, as nearly as I can make out, conform to 

 the common model of twenty-five or thirty years ago. The general 

 objection to American stands seems to be that they furnish more 

 mechanism than the particular worker who wrote the complaint happens 

 to require for his particular work. He makes a more specific charge, 

 however, that they have a joint in the body by means of which they may 

 be tipped out of a vertical position, when the makers ought to have 



* Jouni. New York Mior. Soc, iv. (1888) pp. 106-15. 



