370 
SPECIMENS AND MOUNTS FOR EXHIBIT 
Illustrating the principles of genetics: 
Pea seeds illustrating a dihybrid ratio (wrinkled, smooth, yel- 
low, green). 53. In vials. 54. Riker mount. 
55. Jimson weed (Datura)—imount to show F, segregation of 
spiny and smooth pods. 
Corn showing monohybrid and dihybrid ratios : 
Ears of parents and F,—seed of F, in vial 
un- 
mounted. 
57. Same mounted in glass covered display case. 
58. I*, ears in glass tubes—for counting kernels. 
59, Sorghum—Hybrid vigor—Riker mount of parents and F,. 
60. Sorghum—Inheritance of seed color—Riker mount. 
61. Oats—Mendelian inheritance of hull color—Riker mount. 
62. Snapdragon—Inheritance of flower color—Riker mount. 
Economic plants: 
63. Bundles of cereal grains (barley, oats, rice, rye, sorghum, 
wheat ). 
64. Test tubes of cerca 
65. Types of cereal grains—Riker mount. 
Riker mount. 
— 
grains—threshed. 
66. Types of wheat 
Fungt and plant diseases: 
Bracket fungi: 67. Unmounted. 
68. Mounted in cardboard boxes with cellophane covering. 
Leaves showing leaf spot diseases (rusts, mildews, and others). 
69. Unmounted. 70. Mounts covered with cellophane. 
71. Riker mount—specimens of six diseases. 
Smut of oats or wheat, or ergot of rye. 
72. Unmounted. 73. Displayed in test tubes. 
Mosses and Ferns: Mounts covered with cellophane. 
74. Life history of a moss plant—Polytrichum commune. 
Lycopodium plants with sporophylls—/75. Unmounted. 76. 
Mounted. 
77. Small fern showing rhizome, roots, buds, leaves—mounted. 
78. Fertile and sterile fronds—various fern species—nounted. 
Anglosperms: 
Pressed leaves—79,. Loose. 80. Mounts covered with cello- 
phane. 
