x CONTENTS (PART II) 



CHAPTER XX 



PAGE 



The Coverings of Young Birds .... .23 



OBSERVATIONAL LESSON XX 



PART I A Developing Tadpole (Continued, second investigation) . . .28 



PART II A Developing Chick (Continued, second investigation) . . .29 



PART III A Spring Twig ........ 30 



CHAPTER XXI 

 Opening Buds .......... 32 



OBSERVATIONAL LESSON XXI 

 PART I A Tuber (Continued, third investigation) . . . . .35 



PART II The Development of a Bud ....... 35 



PART III An Earthworm ........ 36 



CHAPTER XXII 

 Observations on Earthworms . . . . . . . . 37 



OBSERVATIONAL LESSON XXII 



PART I A Tadpole (Continued, third investigation) . . . . .42 



PART II The Development of a Bud (Continued, second investigation) . . 43 



PART III A Wood-louse ........ 43 



CHAPTER XXIII 



Observations on Wood-lice and Centipedes ...... 45 



CHAPTER XXIV 



Work for the Easter Holidays- 

 Photographs Nature Calendars and Note Books Survey Maps Collections . 50 



OBSERVATIONAL LESSON XXIII 

 PART I A Tuber (Continued, fourth investigation) . . . . .53 



PART II A Wood-louse (Continued, second investigation) . . . .53 



PART III An Opening Flower ....... 54 



PART IV Silkworm Eggs ..... 54 



