Leaders. 99 



of exposure in the pickle. Also to save time by running 

 these experiments simultaneously side by side, number- 

 ing each experiment ; and under that number keeping a 

 written record of just what it is and its results. The 

 notes should be made at the time of the observation, and 

 not later from memory, since memory is treacherous, and 

 it is of the first importance to be sure of one's ground 

 when later the effort is made to collate and compare 

 these notes and deduce sound conclusions from them. 

 At all events, that is substantially the way that a pro- 

 fessional experimenter would do. 



Also, Dr. Garlick's method of drawing the gut from 

 the living worm, as hereinbefore described, should cer- 

 tainly be tried. The pickling method has its advantages 

 as a commercial process, if it can be made to work, since 

 if any number of worms are ripe at the same moment, 

 all can then be at once pickled ; whereas, of course, all 

 could not be operated on after Dr. Garlick's method at 

 one and the same time, and some of the worms might 

 actually begin to spin before their turn came. This 

 may have been a reason why the pickling method was 

 first adopted. Mr. Orvis's article, hereinbefore referred 

 to, should be carefully read by all who newly enter 

 this field. While he did not succeed in producing per- 

 fect gut, he did succeed without difficulty in raising 

 worms four and a half inches long, and three-quarters 

 of an inch in diameter. What he says of their care and 

 culture cannot fail to be profitable. 



I feel as confident that success can be attained by the 

 pickling method, as that it cannot be attained without first 

 discovering by experiment the conditions upon which 

 success depends. Nor in expressing this confidence am 

 I at all influenced by my wishes. In a somewhat long 



