IV 



PREFACE. 



Hours. 

 Preliminary practice with 



microscope 3 



Fern 10 



Earthworm 10 



Amoeba 2 



White blood-corpuscles 1 



Hsematococcus 4 



Paramoecium 2 



Vorticella 2 



Yeast 5 



Peuicillium \ 



Lichen C 4 



Mushroom ) 



Bacteria 2 



Spirogyra 2 



Hydra 4 



Mussel... . 5 



Hours. 



Lobster 4 



Moss 5 



Stern, bud, leaf 4 



Flower 4 



Seeds 2$ 



Seedlings 4 



Seed-contents . 4 



Circulation, etc., of proto- 

 plasm 2 



Karyokinesis 2 



Frog 12 



Fish 2 



Pigeon 6i 



Rabbit 10i 



Embryology: 



Frog 6* 



Chick.. ..16 



At the present time laboratory-directions in a course 

 in General Biology necessarily presuppose the use of 

 subjects and to some extent of methods employed by 

 previous writers. For the mode of presentation of cer- 

 tain topics my acknowledgments are due especially to 

 Prof. E. A. Andrews and to Prof. V. M. Spalding. 



To Prof. T. H. Morgan, who has been so good as to 

 read and criticise the directions for Invertebrates, Plants, 

 and Embryology, and to Prof. J. W. Warren, who has 

 kindly advised me in regard to the Vertebrate work, it 

 gives me great pleasure to acknowledge my indebtedness. 



H. R. 



BKYN MAWB COLLEGE, June 1897. 



