No. 3, July, 1921] CYTOLOGY 257 



1822. Needham, J. G. The new wild life preserve near McLean, N. Y. Sci. Monthly 

 12: 246-252. Fig. 1-2. 1921.— This bog, 15 miles from Cornell University and always the 

 object of interest and study, has recently been made into a wild life preserve and placed in 

 the keeping of the Trustees of the Lloyd Library. A professor from one of the biological 

 departments of Cornell University is to be custodian. The author has been designated as 

 the first custodian. The preserve is an uncultivated area of about 100 acres. The 2 maps 

 show the roads and houses in the vicinity, the topography, and the character of the vegeta- 

 tion. A fence to keep out grazing animals and signs inviting naturalists to enter for study 

 but not for destruction are the protective measures adopted. — L. Pace. 



1823. Stebbing, E. P. Higher forestry education for the empire. Nature 106: 438-440. 

 1920. — Discussion, relating chiefly to India, as to whether forest probationers should be 

 trained at one central institution. — 0. A. Stevens. 



1824. VoLKEROZ, K. De opleiding tot vakondernijs in de bloembollenteelt en het tuinbou- 

 wondernijs in de bloembollenstreek. [Professional training in bulb culture and horticultural 

 education in the bulb district.] Weekbl. Bloembollencult. 30: 46-47. 1919. — A general out- 

 line is given of the horticultural education of the Government Horticultural Winter Schools 

 and the Government Horticultural Winter Courses, especially with reference to the bulb- 

 growing districts of the Netherlands. Winter courses (short courses) in the bulb districts 

 are given in Bennebroek, Hillegom, Lisse, Sassenheim, and Noordwijk. A winter school is 

 established at Lisse, also a course to train horticultural teachers in bulb raising. In the 

 winter courses, 5 subjects are taught; in the winter schools 20 subjects, among them the 

 English, German, and Russian languages. The winter schools and winter courses have 1768 

 and 300 lecture hours respectively; both courses extend over 2 years. — /. C. Th. Uphof. 



1825. Weatherby, C. A. What the Latin names mean — I. Amer. Fern Jour. 10: 113- 

 115. 1920. — The article consists of a list of 41 specific names, beginning with acrostichoides 

 and extending through frondosa, with origin and meaning- of each. — F. C. Anderson. 



CYTOLOGY 



Gilbert M. Smith, Editor 

 Geo. S. Bryan, Assistant Editor 



(See also in this issue Entries 1904, 1945, 1946, 2148, 2195) 



1826. Bailey, I. W. The cambium and its derivative tissues. III. A reconnaissance of 

 cytological phenomena in the cambium. Amer. Jour. Bot. 7: 417-434. 4 V^- 1920. — The 

 elements of the cambium in gymnosperms and angiosperms, although they may attain a 

 very great length (9,000 microns), are uninucleate. The sphere of influence of the nucleus 

 must, therefore, sometimes extend for several thousand microns. The nucleo-cytoplasmic 

 ratio in cambial initials may vary greatly but in Pinus Strobus, at least, the chromosome 

 number is always constant; and in all material examined chromosome size is also essentially 

 constant. Winkler's conclusion that there is a close correlation between cell size and chro- 

 mosomal mass evidently does not hold for the cambium. The fusiform cambial initials, which 

 are frequently several hundred times as long as they are wide, divide longitudinally in the 

 tangential plane, the continual increase in the periphery of the cambium not being met by 

 radial divisions but by the cells sliding by one another. The longitudinal division takes 

 place through an extraordinary extension of the cell plate. The spindle fibers thicken between 

 the daughter nuclei after mitosis, producing a cell plate, and this plate is extended upward 

 and downward from the region of the nuclei through the operation of two masses of kino- 

 plasmic fibrillae, the kinoplasmasomes, the new wall ultimately reaching both ends of the 

 protoplast. The author discusses the types of cell plate formation described by various 

 authors and believes that they represent diiTerent phases or stages of a single fundamental 

 type of cytokinesis. The significance of the cambium in the investigation of various cyto- 



