64 CURRENT NOTICES AND MEMORANDA. 



America. The subjects treated of are divided into various depart- 

 nients, e.g., New Remedies from Private Practice, Transactions, 

 Correspondence, etc. etc. 



The "Clinic" and "Medical News" are both published 

 weekly, at a dollar per annum. We should think that the small 

 price of one penny a week would bring them within the means of 

 the medical student or practitioner of even a limited income. 



Miscellany of Microscopic Illustrations. By E. Wade- 

 Wilton, of Leeds. — We have received a forward copy of the first 

 issue of this work. The Miscellany will commence in June, and 

 be continued Monthly. The Illustrations, which are exceedingly 

 well executed, are from copper plates, and are, with the descrip- 

 tions, printed by lithography on good plate paper. They will 

 doubtless prove a valuable help to the student of Pond Life. 



Current IRoticce anb flDentorauba. 



The Asparagus-Stem for Laboratory Study.— "This plant 

 affords as interesting and instructive an example of the stem of 

 Monocotyledons, as the now generally used Pumpkin-stem does 

 of the Dicotyledons. It is so common that every botanical 

 laboratory can be supplied with it, and its early appearance, and 

 long-continued growth, make it possible to secure fresh specimens 

 during many months of the year. The new shoots, such as are 

 sold in the markets, if placed in alcohol, afford good material for 

 study, although we have found it a better plan to make all the 

 sections we wanted of fresh stems, and then to preserve these 

 sections in alcohol. Thus, some cross and longitudinal sections 

 of the young stems we made early last year, are still in most 

 excellent condition for study. Not the least interesting feature of 

 the Asparagus-stem is its provision for increasing its diameter by 

 the subsequent formation of fibro-vascular bundles in a sub-cortical 

 meristem zone. This will afford material for much careful study 

 on the part of students in the laboratory." 



Ai7icrica}i Naturalist. 



Exchan^^c— I offer Fossil Diatoms from Franzenbad, in 

 Bohemia, and from Celle, in Hanover (any quantity), in exchange 

 for good Micro-material or Mounted Slides. 



J. C. RiNNBOCK, 



14, Simmering, near Vienna, Austria. 



