866 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Taylor, G. C. — New Mechanical Lamp. 



[" A modification of the Hitchcock lamp, in which the burner is brought 

 very low upon the table, while the intensity of the light is regulated 

 by a movable diaphragm which increases or curtails the volume of air 

 admitted to the fan. A practical test of the light in resolving fine 

 Hues proved its superiority over all lamps yet devised."] 



The Microscope, II. (1882) p. 128. 



Trutat, E. — Traite elementaire du Microscope, le Partie. Le Microscope et 



son emploi. (Elementary Treatise on the Microscope . Part I. The Microscope 



and its employment.) xvi. and 322 pp., 171 figs., and 1 phototype. 8vo, Paris, 



18S3 (1882). 



Ward, E. H. — Keport of Committee on Eye-pieces. [Supra, p. 861.] 



Amer. Mori. Micr. Journ., III. (1882) p. 175. Cf. also p. 171. 

 „ „ Microscopy at the American Association. 



[Note on the first meeting of the new section of Histology and Micro- 

 scopy and Dr. Carpenter's visit.] 



Amer. Natural., XVI. (1882) p. 931. 

 Wheeler, E. — Lecture on Light, the Microscope, &c. 



1st Joum. § Bep. Braintree $ Booking Micr. fy Nat. Hist. Club, 1882, pp. 12-14. 



/3. Collecting, Mounting and Examining Objects, &c. 



Methods of Microscopical Research in use in the Zoological 

 Station at Naples.* — Dr. P. Mayer gives an account of the methods 

 employed at the Naples Zoological Station for preserving, staining, 

 and mounting objects, some of which have not previously been 

 published. Although they are only mentioned in connection with 

 marine forms they are in many cases applicable also to fresh-water 

 organisms, insects, &c. 



I. Pkesekvative Fluids. — Killing, hardening, and preserving are 

 three kinds of work, requiring for their accomplishment sometimes 

 only a single preservative fluid, but in most cases two, three, or even 

 more. As the same fluid often does the work of killing and hardening, 

 and sometimes of preserving too, it is impossible to divide them into 

 three classes corresponding to the kinds of work, except by repeating 

 many of them twice, and some of them three times. While it is there- 

 fore more convenient to include them all under " preservative fluids," 

 as Dr. Mayer has done, it is none the less important to remember what 



* MT. Zool. Stat. Neapel, ii. (1880) pp. 1-27. We ought long since to have 

 printed a translation of this paper, but in consequence of a succession of accidents 

 we have been prevented doing so, notwithstanding that we had a complete 

 translation made of it soon after it appeared. The abstract we now give is that 

 (with slight alterations) of C. O. Whitman in Amer. Natural., xvi. (1882) 

 pp. 697-706, who says " I have added the methods of Dr. Giesbrecht, Dr. Andres 

 (infra), and some others who have worked in the zoological station. Dr. Mayer has 

 further placed at my disposal such improvements and alterations as he has been 

 able to make since the publication of his paper. I am also deeply indebted to 

 Dr. Mayer for advice and generous assistance, for which I wish here to give ex- 

 pression to my most sincere thanks and grateful appreciation. I am still further 

 indebted to Dr. Eisig, Dr. Lang, Dr. Andres, Dr. Giesbrecht, Professor 

 Wei&mann, and Professor Dohrn, all of whom I have had occasion to consult 

 with reference to matter contained in this paper." Mr. G. Brook, junr., also 

 rendered a very useful service to microscopists by publishing a summary in 

 ' Naturalist,' vi. and vii. (1881), parts of which are embodied in the text. 



