630 SUMMARY OF CUERENT RESEARCHES RELATING TO 



names are attached to the title-page, which moreover bears the motto 

 " Mens Sana in corpore sano." That we do not criticize it without 

 reason will be seen by the following extract which is prefaced by the 

 statement that it contains a " few practical hints which we trust may 

 " powerfully tend to facilitate the young experimentalist's labours." 

 (The italics are ours.) 



" The Microscrope (sic). — You cannot expect to get one of any 

 valuable power (!) under five guineas. It should be of two powers, 

 enabling you to use inch and quarter-inch glasses (!) The hole in 

 the stage should have its axis diametrically consistent (/) with that of 

 the tube of the instrument. A stand is also needed (! !) Object-glasses, 

 denoted as one-fourth, one-fifth, one-sixth, are used for high powers, 

 one-half to two-fifths {}.) for low. An oil-immersion lens is now-a-days 

 a necessary complement, and should be about one-twelfth. The 

 simpler it is the better for a beginner (!) The same may be said of 

 the eye-piece (! !) With respect to such other adjuncts as achromatic 

 condensers, special stands, &c.j these concern the accomplished micro- 

 scopist rather than the tyro." 



As it was obvious that the author was not at home in the optical 

 branch of his subject, we turned to the description of a piece of 

 apparatus with which the practical physiologist should necessarily be 

 intimately acquainted — the Microtome. Will it be believed that it is 

 described not as an instrument for cutting sections, but for freezing 

 specimens ! The author's own words are as follows : " The Micro- 

 " tome. This useful device for freezing specimens is susceptible of 

 " various forms of construction." 



After these extracts it is fuperfluous to refer to the other minor 

 blunders which disfigure the book, such as the description of Dr. Klein 

 as " Klean," the indiscriminate use of " bichromate of potash," 

 " potass " and " potassium," and " potassic bichromate " for the same 

 substance. 



Postal Microscopical Society — This society is now forming a 

 section specially devoted to members of the medical profession (in- 

 cluding students). 



" A Pbesident." — Suggestion for making the ' Journal of Microscopy ' the Journal 

 of provincial and other Microscopical Societies. 



Journ. of Micr., III. (1884) pp. 194-5. 

 "Amateur." — Bacteria and the Microscope. 



[Elementary Inquiries.] Engl. Mech., XXXIX. (1884) pp. 465-6. 



American Society of Microscopists, Session of 1884. — Circulars of President 



J. D. Cox, and E. H. Griffith. Micr. Bull, I. (1884) pp. 25 and 28. 



Amer. Mm. Micr. J mm., V. (1884) pp. 117-8. 

 The Microscope, IV. (1884) p. 133. 

 Belfield, W. T. — Photo-micrography in Legal Cases. \Postr\ 



Photography (Chicago), I. (1884) pp. 54-9 (7 figs.). 

 Bradbuey, W.— Papers relative to the theory of the Object-glass. 



[Note introducing paper by Dr. C. S. Hastings, from ' Amer. Journ. Sci.,' 

 detailing the method used by him to determine the optical properties of 

 various kinds of glass and the alterations in the properties when the 

 glass was subjected to different temperatures.] 



Engl. Mech., XXXIX. (1884) pp. 420-1. 



