No. 7. DEPARTMENT OF AGRICULTURE. 655 



No. 30.* Sex in Plants, 17 pages, 1897. 



No. 31.* The Economic Side of the Mole, 42 pages, 1898. 



No. 32.* Pnre Food and Dairy Laws, 30 pages, 1898. 



No. 33.* Tabulated Analyses of Commercial Fertilizers, 42 pages, 

 1898. 



No. 34.* Preliminary Eeport of the Secretary, 150 pages, 1898. 



No. 35.* Veterinary Medicines, 23 pages, 1S98. 



No. 36.* Constitutions and By-Laws, 72 pages, 1898. 



No. 37.* Tabulated Analyses of Commercial Fertilizers, 40 pages, 

 1898. 



No. 38.* Farmers' Institutes in Pennsylvania, 8 pages, 1898. 



No. 39.* Farmers' Institutes in Pennsylvania, 88 pages, 1898. 



No. 40.* Questions and Answers, 206 pages, 1898. 



No. 41.* Preliminary Eeports of the Department, 189 pages, 1899. 



No. 42.* List of Creameries in Pennsylvania, 88 pages, 1899. 



No. 43.* The San Josd and other Scale Insects, 22 pages, 1899. 



No. 44.* Tabulated Analvses of Commercial Fertilizers, 62 pages, 

 1899. 



No. 45.* Some Harmful Household Insects, 13 pages, 1899, 



No.* 46. Some Insects Injurious to Wheat, 24 pages, 1899. 



No. 47.* Some Insects Attacking Fruit, etc., 19 pages, 1899. 



No, 48.* Common Cabbage Insects, 14 pages, 1899. 



No. 49.* Methods of Protecting Crops, etc., 20 pages, 1899. 



No. 50.* Pure Food and Dairv Laws of Pennsvlvania, 33 pages, 

 1899. 



No. 51.* Tabulated Analyses of Commercial Fertilizers, 69 pages, 

 1899. 



No, 52.* Proceedings Spring Meeting of Round-up Meeting, 

 Farmers' Institute Managers, etc., 296 pages, 1899. 



No. 53.* Farmers' Institutes in Pennsvlvania, 1899-1900, 94 pages 

 1899. 



No. 54.* Tabulated Analyses of Commercial Fertilizers, 163 



pages, 1899. 



No. 55.* The Composition and Use of Feltilizers, 126 pages, 1899. 



No. .56. Nursery Fumigation and the Construction and Manage- 

 ment of the Fumigating House. 24 pages, 1899, 



No. 57. The Application of Acetylene Illumination to Country 

 Homes, 85 pages, 1899. 



No, 58. The Chemical study of the Apple and Its Products, 44 



Fungous Foes of Vegetable Fruits, 39 pages, 1899, 

 List of Creameries in Pennsylvania, 33 pages, 1899. 

 The Use of Lime in Pennsylvania Soils, 170 pages, 1900. 

 A Summer's Work Abroad in School Grounds, Home 

 Grounds, Play Grounds, Parks and Forests, 34 pages, 1900. 



No. 63. A Course in Nature Study for Use in the Public Schools, 

 119 pages, 1900. 



No. 64. Nature Studv Reference Library for Use in the Public 

 Schools, 22 pages, 1900. 



No. 65. Farmers' Library List, 29 pages, 1900. 



No. 66.* Pennsylvania Road Statistics, 98 pages, 1900. 



No. 67. INIethods of Steer Feeding, 14 pages, 1900, 



*Note. — Edition exhausted. 



