186 
For identification of plant diseases, representative portions of the 
part diseased should be sent. 
ET. JCI RX: 
To assist members and others in studying the collections the 
services of a docent may be obtained. Arrangements should be 
made by application to the Curator of Public Instruction one week 
in advance. No parties of less than six adults will be conducted. 
This service 1s free of charge to members; to others there is a 
charge of 50 cents per person. For information concerning mem- 
bership in the Botanic Garden see page 3 of the cover of this 
PROSPECTUS, 
lV. COURSES OF INSTRUCTION 
Each of the courses here announced is a unit and not a series of 
unrelated lectures. Students must enroll for an entire course. 
No registrations will be made for separate class exercises. 
Courses of instruction are offered in Botany, Gardening, and 
Nature Study, and are divided into four classes: 
A, For members and the general public (“ A” courses, p. 187) 
B. For teachers (“ B ” courses, p. 191) 
C. For children (“C” courses, p. 193) 
D. Other courses of a special nature (‘ D” courses, p. 195) 
No course will be given when less than ten persons apply for 
registration, Since registration in many of the courses is. re- 
stricted to a fixed number on account of the limited space avail- 
able in the greenhouses, and for other reasons, those desiring to 
attend are urged to send in their application for enrollment and the 
entrance fee to the Secretary, Brooklyn Botanic Garden, several 
days in advance of the first exercise. This avoids delay at the be- 
ginning of the first exercise, ensures a place in the course, and 
enables the instructor to provide adequate material for the class. 
Persons are requested not to register in any course, unless they 
are reasonably confident that they can attend the sessions of the 
class regularly and throughout. This is specially important where 
the number to be enrolled is limited. To register and not attend 
