ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 811 



M'Intosh, L. D. — Lanterns for Projection. 

 [Includes microscopic projections.] 



Photography, I. (1884) pp. 131-4 (6 figs.). 

 MoELLEE, J. — Ein neues Piaparirinikroskop. (A new dissecting Microscope.) 

 lAnte, p. 613.1 



Zcitsch: f. Wiss. Mikr., I. (1884) pp. 412-3. 

 MooBE, A. Y. — Beck's Vertical Illuminator and Immersion Objectives. 



[Description and directions for use. Also as to coating diatoms with silver, 

 infra, p. 829.] 



The Microscope, IV. (1884) pp. 157-9, 165. 



„ ^ „ The Fakir's Secret. 



[A propos of F. L. James's account of the exhibition of paste eels as animal- 

 cules in water, ante, p. 146. The secret is probably the use of a few drops 

 of cider vinegar, which promotes the growth of the eels.] 



The Microscope, IV. (1884) pp. 170-1. 



Nelson, E. M. — A hydrostatic fine adjustment. \_Supra, p. 800.] 



Engl. Mech., XXXIX. (1884) p. 576 (3 figs.). 



„ „ Microscope Tube-length. 



[Reply to query. " Place an object on the stage accurately centered and 

 focused to the objective whose back focus is to be measured. Centre the 

 substage condenser, and focus by it the edge of a flame on the object. 

 Remove the object out of the field, leaving slip and cover-glass betweeii 

 objective and condenser. Take out the eye-piece. Insert down the tube 

 of the Microscope a smaller tube having its lower end closed by a dia- 

 phragm of paraffined tissue paper. Slide this up and down until the 

 image of the flame is focused on it, which will give the solution to the 

 first part of " B. C.'s " question. By pushing the tube further down 

 until the smallest spot of light is found, the place where tlie rays cross 

 can be determined."] 



Engl. Mech., XXXIX. (1884) p. 589. 



„ „ Plane Mirror for Microscope. 

 [Reply to query. "I find it difficult to write a complete answer to 

 ' Mirror's ' question witliin reasonable limits, there being so many com- 

 binations and varieties of methods of illumination, each of which demands 

 a separate consideration before the reply could be termed exhaustive. 

 1. When using artificial transmitted light with substage condenser, I, 

 if possible, dispense with tlie mirror altogether and work direct; but 

 when this is not possible, I use the plane mirror. 2. With lamplight, 

 but without a substage condenser, concave mirror. 3. Difl'used daylight 

 without substage condenser, concave mirror with high and mediunj 

 powers. |ilaiie with low. 4. Difl'used daylight with substage condenser, 

 always plane mirror. 5. Dark ground with lamp-light and bull's-eye, 

 always plane mirror."] 



Engl. Mech., XXXIX. (1884) p. 593. 



„ Illumination for the Microscope {in part). [_Post.'\ 



Engl. Mech., XL. (1884) p. 68 (2 figs.). 

 O.SBORNE, S. G. — The Diatomescope. [Supra, p. 802.] 



Engl. Mech., XXXIX. (1884) p. 5G1 and XL. (1884) p. 38. 

 Also letter by S. C. S., XL. (1884) p. 18, supra, p. 803. 



Pease, J. L. — Tlio Facility Nose-piece. 



[Description of it. Ante, p. 425.] The Microscope, IV. (1884) p. 171. 



Pi-EiiN, J — Apparat zur Priifung der Brennwoito des Auges oder anderer 

 opti.scher ByBteme. (Apparatus for testing tlie focal length of the eye or 

 other optical ByBtems.) 



German Patent, Kl. 42, No. 27,860, 27tii January, 1884. 

 PmsER, J. M.— See p. 839. 

 [Reudixo, T. B.]— Tlie Microscope. Its uses and revelations. 



fudi'inapolis Journal, 16th August, 1884, p. 10. 



3 II 2 



