1892.] MICROSCOPICAL JOURI^AL. 05 



EDITORIAL. 



All co)in)iu)iicaiions for this Journal, wJiciJit-r rclatino- to business or lo luli/onai 

 tnaticrs, and all books, pamphlets, exchanges, etc., should be addressed to ^Inieri- 

 can Monthly Microscopical Journal, Washington, D C. 



Dr. Ray Lankester, of Oxford University, is rather severe on tlie 

 new edition of Carpenter in his review in N^citurc. 



While saying that the part written by Dr. Dallinger is of high scien- 

 tific value, and by far the best on the subject, '•'• one which every worker 

 with the microscope should thoroughly study," he. says that the 

 work "• has lost its authoritative character, and is more than ever a patch- 

 work of paragraphs on arbitrarily selected subjects, the responsibility 

 for which is divided in some mysterious way between the editor and 

 certain Fellows of the R. M. Society. There can be no doubt that Prof. 

 Bell would have written an excellent original treatise on microscopic 

 animals, and Mr. Bennett an equally valuable one on plants, but they 

 have not been asked to do this. They and others have contributed frag- 

 ments, which are mixed up with fragments of the original Carpenter in 

 inextricable confusion." 



The answer to this criticism of course is easy — that Dr. Dallinger. 

 assumes responsibility for the entire volume, except where Prof Bell or 

 others are made responsible. Dr. Carpenter's responsibility has ceased 

 and been taken up by the revisors. What matters it whether the new 

 has been patched upon the old so skilfully that one cannot distinguish.^ 

 The indications are that Ray Lankester feels piqued a little over some- 

 thing connected with the volume, and yet we ought not to see any ex- 

 hibition of feeling from so honorable a seat of learning as Oxford. 



Prof. H. L. Tolman, president of the Illinois State Microscopical 

 Society, has consented to become one of our collaborators for 1S92, and 

 to contribute to each number. 



Li the present issue will be found, under New Publications, a notice 

 of the new edition of Carpenter on the microscope. The size of pen 

 that this distinguished writer wields may be judged from this review. 



MICROSCOPICAL APPARATUS. 



Edinger's Drawing Apparatus for Low Magnification. — Dr. 



Ludwig Edinger. of Frankfort-on-the-ALTin, has devised a drawing 

 apparatus which he presented at the vSouthwest German Societ}' for 

 Neurology and Psychiatry, June 7, 1S91, the account of which by Dr. 

 Jos. Collins we extract from the Nciv York Medical Journal of Jan- 

 uary 16. 1S93. 



The apparatus is based on the projection principle, and consists of a 

 stand bearing an upright which supports a tube or cylinder parallel to 

 the base, and in opposition to a piece of canvas-board which cuts oft' all 

 the rays of light, excepting those passing through the cylinder. 



The front surface of the upright has a metal groove into which is 

 fitted at its upper part an arm terminating at the other end in a circular 

 plate for the support of the object to be drawn. Beneath this is a second 

 arm, also fitted into the groove, terminating in a small cylinder for the 



