vi INTRODUCTION. 
connection with the manner in which an animal per- 
forms its life-functions. 
The directions for laboratory work are mainly in the 
form of questions which must be answered from direct 
observation. Comparisons and inferences are con- 
stantly required of the pupil. The exercises for review 
of note-book work enable pupils to systematize their 
knowledge. Useful vocabularies are frequently in- 
serted. 
For many valuable suggestions the author is in- 
debted to Miss Helen A. Gardner and Miss Mary E. 
Winn of the Girls’ High School, Boston, and Prof. B. 
H. Van Vleck of Boston University, who read the 
manuscript; and to Mr. Frank M. Whitney, principal 
of the Watertown, Mass., High School and Miss E. O. 
Patch of the Girls’ High School, Boston, who ex- 
amined the proof-sheets. Mr. Lyman G. Smith of the 
Roxbury High School and Mr. Arthur E. Sanford 
assisted in preparing some of the drawings, and many 
of the illustrations have been reproduced, by per- 
mission, from Agassiz’s ‘‘ Seaside Studies’’ (Houghton, 
Mifflin, & Co.), ‘‘The Horse’’ by W. H. Flower 
(D. Appleton & Co.), various works published by 
Longmans, Green, & Co., and other sources. 
A LIST OF BOOKS. 
All the books on the list given below have been 
found useful to pupils, and nearly all of them have been 
reported as ‘‘interesting’’ by many pupils who have 
read them. Such books may be used to advantage in ~ 
the preparation of Reports. The list was first printed 
by a branch of the Agassiz Society connected ‘with the 
Roxbury High School of Boston, Mass. 
ABBoTT, CHARLES ConrRAD: 
A Naturalist’s Rambles about Home. 
Bird Land Echoes. Illustrated. 
Agassiz, ELizaBrETH and ALEXANDER: 
Seaside Studies in Natural History. Illustrated. 
