Botany. 419 



9. On the multiplication of Bryophyllum calycinum. — Dr. B. 

 "W. Baeton, of Baltimore, in an interesting preliminary communi- 

 cation respecting this subject, calls attention to the fact that the 

 leaves of a plant under cultivation which grew well during the 

 summer, fell during the month of September. But, instead of 

 withering before their fall, these leaves remained plump and gi'een 

 up to the very last, whereas the leaves of our ordinary plants are 

 emptied of their protoplasm before they are detached. These 

 fresh leaves in about ten days after they were separated gave 

 rise to buds and a fine crop of healthy plants. Dr. Barton asks 

 whether the time of defoliation may be related to the time of oc- 

 currence of hurricanes in the tropics. 



10. Enumeratio Plantarum Guatemalensium imprimis a U. 

 DeTiierckheim collectarum quas edidit John Donnell Smith. 

 Pars I. (Oquawka, 111., 1889).— Mr. J. Donnell Smith, of Bal- 

 timore, has been engaged for some years in the elucidation of the 

 flora of Central America. The present list is one of the results 

 of that study. Mr. Smith is at this time making a botanical 

 journey in Guatemala. G. l. g. 



11. Journal of Andre Michaux, 1787-1796. (Proceedings of 

 American Philosophical Society, vol. xxvi, No. 129.) — This is the 

 carefully edited publication of the diary (in French) of our most 

 assiduous botanical explorer. Professor C. S. Sargent has fur- 

 nished critical notes and an abstract of the biography of Michaux, 

 thus enabling the reader to follow intelligently the daily life of 

 a botanist of the last century. The diary demanded in its print- 

 ing very great care, and this it appears to have received through- 

 out. G. L. G. 



12.. Annals of Botany. London, 1889. — This valuable journal 

 is now in its third volume and has gained for itself an assured 

 position among first-class scientific periodicals. It is pleasant to 

 note that some of the important contributions have come from 

 this country, mainly from the laboratory conducted by one of the 

 editors, Professor Farlow. The price of the journal has been ad- 

 vanced to thirty shillings. G. l. g. 



13. Herbarium of the late Rev. Dr. Joseph Blake. — This large 

 collection, representing the fruits of a life-long interest in botany, 

 and containing specimens from nearly all the American botanists 

 who have been in active exchange during the last fifty years, is 

 now offered for sale^ The herbarium is in good condition, and 

 comprises, besides the plants referred to above, a considerable 

 number of species beyond our*own limits. Information regarding 

 the collection may be obtained from Mrs. Joseph Blake, Andover, 

 Mass. G. L. G. 



14. Outlines of Bessons in Botany. Part I. From seed to 

 leaf; by Jane H. Newell. Boston, 1889. Small 8vo, pp. 140. 

 — Miss Newell's large experience in the teaching of young chil- 

 dren has enabled her to prepare an exceedingly useful book. The 

 questions are well chosen and sharply put. g. l. g. 



Am. Jour. Sci.— Third Series, Vol. XXXVII, No. 221.— May, 1889. 

 26a . 



