288 SUMMARY OF CURRENT RESEARCHES RELATING TO 



His's Drawing Apparatus. 

 [Vol. 11. (1882) p. 402.] 



Amer. Natural., XVII. (1883) pp. 227-9 (1 fig.). 



Hitchcock, E. — Notes (1) to Subscribers as to punctual payment of subscriptions ; 

 (2) as to tlie change of management (publisliers) of the Journal ; and (3) on 

 editorial perj^lexities. 



A7ner. Mon. Micr. Journ., IV. (1883) p. 12. 



„ „ The American Postal Microscopical Club. 

 [Note as to the obligations of the members in regard to putting slides in the 

 boxes, &c.] 



Amer. Mon. Micr. Journ., IV. (1883) pp. 14-15. 



„ „ The Projecting Microscope for Class Demonstrations. 

 [General remarks, especially as to the desiiability of opticians devising a 

 better form, and as to the advantages to be obtained by it for purposes of 

 instiuction.] 



Amer. Mon. Micr. Journ., IV. (1883) pp. 15-16. 



„ „ Correction -adjustment for Objectives. 

 [Discussion of the advantages with particular reference to Dr. L. Dippel's 

 paper in ' Zeitschr. f Instrumentenk.' " It may be said tliat the importance 

 of correction-adjustment increases with dry objectives as the angular aper- 

 ture incrL-ases." Witli reference to homogeneous-immersion objectives, 

 he considers that " practically, the advantage of the collar-adjustment is 

 quite illusory when the microscope is applied to the study of objects the 

 structure of which is unknown."] 



Amer. Mon. Micr. Journ., IV. (1883) pp. 28-30. 



„ „ Standard Sizes for Oculars and Sub-stages. 



[Note on the Committee's Report, II. (1882) p. 595. '• It is to be hoped 

 that our American makers will adopt the same sizes."] 



Amer. Mon. Micr. Journ., IV. (1883) pp. 35-6. 

 „ „ See Mendenhall, T. C. 



HoLMAN, D. S. — Projecting Microscope of peculiar design. 

 [Exhibition only.] 



Proa. Acad. Nat. Sci. PhUad., 1882, p. 359. 

 Johnson, G. J. — Photomicrography. 



[Description of necessary apparatus, manipulation, &c.] 



Micr. Neirs, III. (1883) pp. 113-21 (2 figs.). 

 Jones, T. R. See Griffitli, J. VV. 



Journal of the Royal Microscopical Society. Vol. II. 1882. 

 [Review.] 



Journ. of Sci., V. (1883) pp. 108-110. See also p. 115. 



KiTTON, F. — jMagnifying measurements. 



[Reply to H., E. A. C, supra, tliat he must have made some mistake, either 

 in the powers or in making his measurements. Al.-_o describes method of 

 ascertaining the magnifying power by observing a scale with one eve.] 



Sci.-Gossip (1883) pp." 66-7. 

 Langley, J. N. See Foster, M. 



Lof:wenherz, L. — Zur Geschichte der Entwickelung der mechanischen Kunst. 

 III. Die Feiiieintheilung von Kreisen. (On the History of the developmunt 

 of mechanical Art. III. The fine dividing of Circles.) 



[Deals with the emjiloyment of Micro-scopes in the process.] 



Zeitschr. f. Instrumentenk., II. (1882) pp. 447-59 (7 figs.). 



Malassez, L. — Sur les perfectionnements les plus re'cents apportes aux appareils 

 hemochromometriques et sin* deux nouveaux lie'mochromometres. (On the 

 most recent improvements in hsemochromometric apparatus and on two new 

 hsemochromometers.) 



Trav. Lab. d'Histol. Coll. France, 1882, pp. 105-60 (2 figs.). 



