August, ’20] CRANDALL: BEE CULTURE DEMONSTRATIONS 
357 
The suggestion has been made to the writer that a professional ento¬ 
mologist should have a line of insecticides for sale, in other words, combine 
the commercial with the professional. In some rare cases this might 
work out to advantage, but I firmly believe that in the majority it will 
be more harmful than helpful. I came to this conclusion by the fact 
that few lawyers sell law books and doctors do not sell their medicines. 
There is the distinctive commercial field and also the consulting 
practice. Some may choose one and some the other. 
No one consulting entomologist will be able to cover all phases of 
entomology in his practice, any more than the research worker or 
systematise The attempt must not even be made. Consultation 
with others better informed upon certain problems must be frequent. 
The quack doctor runs a bluff game. A bluffing doctor only discredits 
himself, but in the case of a new business profession the bluffer will 
discredit his profession, as well as himself and his co-workers. 
There must be close cooperation between the laboratory and field 
research worker and the professional consulting or contracting ento¬ 
mologist. The latter must turn to the former for certain fundamentals 
and the former will have to look to the professional for the strictly 
practical application of his methods. 
The few who have already chosen to be pioneers in this new profes¬ 
sion are sincere, modest, and we trust will prove capable. 
THE VALUE OF FIELD DEMONSTRATIONS IN EXTENSION 
WORK IN BEE CULTURE 
By L. B. Crandall, Storrs, Conn. 
All extension workers have found that the best way to get informa¬ 
tion to another person is to carry it to him, and the best way to get him 
to use it is to show him how. 
This is also true in other lines of education; hence, we have in nearly 
all of our schools, laboratories and workshops for many lines of study. 
You can tell a man how to do a certain task by means of a book, bulle¬ 
tin, or personal letter, but he will often get from that description a 
very different picture from what you intended. If you go to see him 
and demonstrate what you mean, he will get your idea clearly. 
All men interpret what they read, more or less, from the background 
of their own experience. If their experience has not been somewhat 
similar to yours, they cannot interpret correctly what you write. 
For these reasons I believe that field demonstrations form the most 
important part of extension work. 
It is quite generally agreed, I believe, that a bulletin without pic¬ 
tures to illustrate its text is practically useless to any person who lacks 
