Categories
- Antiques & Collectibles 13
- Architecture 36
- Art 47
- Bibles 22
- Biography & Autobiography 810
- Body, Mind & Spirit 47
- Business & Economics 24
- Computers 4
- Cooking 94
- Crafts & Hobbies 3
- Drama 346
- Education 45
- Family & Relationships 34
- Fiction 11811
- Games 19
- Gardening 17
- Health & Fitness 33
- History 1377
- House & Home 1
- Humor 147
- Juvenile Fiction 1873
- Juvenile Nonfiction 202
- Language Arts & Disciplines 88
- Law 16
- Literary Collections 686
- Literary Criticism 179
- Mathematics 13
- Medical 41
- Music 39
- Nature 179
- Non-Classifiable 1768
- Performing Arts 7
- Periodicals 1453
- Philosophy 62
- Photography 2
- Poetry 896
- Political Science 203
- Psychology 42
- Reference 154
- Religion 451
- Science 126
- Self-Help 7
- Social Science 80
- Sports & Recreation 34
- Study Aids 3
- Technology & Engineering 59
- Transportation 23
- Travel 463
- True Crime 29
Nettie Maria Stevens
The author has not yet completed their profile.
Author's Books:
Sort by:
RESULTS OF INVESTIGATIONS. Termopsis angusticollis. In the termite it was not found to be practicable to dissect out the testes. The tip of the abdomen was therefore fixed and sectioned, young males whose wings were just apparent being used. The cells are all small, and could not be studied to advantage with less than 1500 magnification (Zeiss oil immersion 2 mm., oc. 12). In the spermatogonium there...
more...
COLEOPTERA. Trirhabda virgata (Family Chrysomelidæ). Two species of Trirhabda were found in larval, pupal, and adult stage on Solidago sempervirens, one at Harpswell, Maine, the other at Woods Hole, Massachusetts. The adult insects of the two species differ slightly in size and color, the germ cells mainly in the number of chromosomes, Trirhabda virgata having 28 and Trirhabda canadense 30 in...
more...