75) 



To prevent any lost motion, and to push back the razor support when 

 the 4-inch wheel is turned backward, a strong spiral spring may be placed 

 on the bolt so as to extend from the bearing to the nut. 



With the above described arrangement of parts, sections can be cut one 

 thirty-two hundredth of an inch thick. By shifting the eccentric so that 

 alternate teeth work, the sections are of double the thickness, etc. But 

 little eccentricity is needed, about one-sixteenth of an inch being sufficient 

 when each tooth of the ratchet is employed. 



On the organogeny of Composit^e. By G. W. 3Iartin. 



On the development of the akchegonium and apical growth in the 



STEM OF TsUGA CANADENSIS AND PiNUS SYLVESTRIS. By D. M. MOT- 

 TIER. 



[abstract.] 



This work consisted in a study of the development of the archegonium 

 and the meristems of the stem. The results obtained in reference to the 

 archegonium differ from those of Strasburger in that the neck of that organ 

 in Tsuga consisted of two cells in as many cases as where one only was 

 found, and very rarely three. In Pinus the neck of the archegonium was 

 found to be made of two layers of cells, four in each layer, lying one above 

 the other, instead of one layer. 



As regards the growth of the stem it is argued that we can not say with 

 certainty that growth proceeds from a single initial cell, as claimed by Du- 

 liot for the Gymnosperms. 



Preliminary notes on the genus Hoffmanseggia. By E. ]M. Fisher. 



Development of the sporangium and apical growth of stem of Botrych- 



lUM ViRGINIANUM. By C. L. HOLTZMAN. 



