1396 Journal of Applied Microscopy 



The annual meeting of the American Microscopical Society will be held in 

 Denver, Col., August "29 to •>!. Efforts are being made'to secure exceptionally 

 low rates, and an enthusiastic and profitable meeting is assured. 



The Hopkins Seaside Laboratory, of Leland Stanford Junior University, 

 began its tenth session at Pacific Grove on Monterey Bay, Monday, June 10, 

 1901. The regular courses of instruction continue six weeks, closing July 'JOth. 

 Provision is made at the laboratory to accommodate three classes of students : 

 (1) teachers and students who wish to pursue laboratory courses in botany and 

 zoology; (2) advanced students in zoology, physiology, and botany; and (o) 

 investigators who are prepared to carry on researches in morphology and physi- 

 ology. The regular courses, with the instructors in charge, are as follows : 



1. General Zoology — Professor G. C. Price, Leland Stanford Jr. Univ. 



2. Elementary Botany — Professor S. C. Price. 



3. Advanced course on Structure and Physiology of Algae. — -Professor G. 



J. Peirce, Leland Stanford Jr. Univ. 



4. Embryology — Professor G. J. Peirce. 



5. Comparative Morphology and Histology of the Nervous System and 



Sense Organs. — Professor F. M. MacFarland, Leland Stanford 

 Junior University. 



6. Advanced course in Zoology. — Professor F. M. MacFarland. 



7. General Ornithology. 



We have received the announcement of the third session of the Rhode Island 

 Summer School for nature-study to be held at the Rhode Island College of Agri- 

 culture and Mechanic Arts, Kingston, R. I., July 5 to 20, 1901. The instruction 

 is to be almost wholly in the nature of field work, the schedule being made up of 

 excursions, led by competent men in every branch of natural science. The time 

 given to class-room exercises will be just enough to indicate what is to be 

 observed and done in the field. Special evening lectures will be given. Com- 

 munications should be addressed to " Summer School," Kingston, R. I. 



QUESTION BOX. 



Inquiries will be printed in this department from any inquirer. 

 The replies will appear as received. 



8. Where can " Stabilite " insulating material be bought ? Is it used much 

 in American laboratories ? l. h. 



9. What is the best method of drying and mounting microscopic fungi ? Can 

 you refer me to a good book dealing with the subject. m. r. 



REPLIES TO QUESTIONS. 



" What is meant by the growing tip in allium ? " (Question No. 1.) 



The growing part of a root {a), or the " growing tip," is a short space about 



v..>^;^= -. - ^.:v.:;:^K-;Jv;- •,:;!; oue-sixth of an inch back from the extreme end. 



^^^ In this part of the root the cells divide rapidly, 



■*K<'/ ^"^^ ^^^ length is thereby increased. This is the 



/ only part of the root in which growth takes 



4 — -'"" 'v;^:^v place. The end of the root is usually covered 



by a protecting coat of dead cells {b), derived from the living zone just back of it. 



These dead cells constitute what is known as the root cap. 



C. A. Whiting. 



