The Chronica Botanica Co., International Plant Science Publishers 



*A New Series of Plant Science Books': — 



I.MacDougal: Tree Growth (revised ed. in prep.) 

 2. Grant: Wood Pulp (first ed. out of print, revised 



ed., published abroad, available at $8.50) 

 3.Darrah: Principles of Paleobotany (revised edition 



in preparation) 

 4.Pfeiffer: Experimentelle Cytologie (being re- 

 printed with a new introduction) 

 6.Guilliermond-Atkinson: The Cytoplasm of the 



Plant Cell (second printing, p. 247, $5.00) 

 7. Reed: A Short History of tte Plant Sciences (p. 



323, $5.50) 

 S.Baldwin: Forest Tree Seed (p. 240, $5.00) 

 9. Lloyd: Carnivorous Plants (p. 352, $7.00) 

 IO.Wulff: Historical Plant Geography (second print- 

 ing, p. 223, $5.00) 

 H.Schopfer-Noecker: Plants and Vitamins (second 



printing, p. 300, $5.00) 

 12.Erdtman: Pollen Analysis (p. 239, $5.00) 

 13.Bawden: Plant Viruses and Virus Diseases (third, 



revised edition, in press, ready shortly) 

 H.Hoagland: Inorganic Plant Nutrition (second 



printing, p. 226, $4.50) 

 IS.Wodehouse: Hayfever Plants (p. 245, $5.00) 

 16.Verdoorn (ed.): Plants and Plant Science in Latin 



America (p. xl + 384, $6.00) 

 17.ZoBell: Marine Microbiology (p. 240, $5.00) 

 18. Wilde: Forest Soils and Forest Growth (p. 242, 



$5.00) 

 19.Condit: The Fig (p. 222, $5.00) 

 20.Howes: Vegetable Gums and Resins (p. 190, $5.00) 

 21. Crafts, Currier and Stocking: Water in the 



Physiology of Plants (p. 240, $6.00) 

 Kelley: Mycotrophy in Plants (in press) 

 Gundersen: Families of Dicotyledons (in press) 

 Johansen: Plant Embryology (in press) 

 Moldenke: Plants of the Bible (in press) 

 Dachnowski-Stokes: Peat Resources of the World 



(in press) 

 Correll: The Orchids of N. America (in press) 

 G. M. Smith (ed.): Manual of Phycology (in press) 

 Stevens: Plant Pathology in Agriculture (in press) 

 Foxworthy: Forests of Tropical Asia (in press) 

 SiRKS: The Evolution of Biology (in preparation) 

 HoNiG and Verdoorn (eds.) : Recent Advances in 

 Tropical Biology and Agriculture (in preparation) 



'Annales CryptogamicI et Phytopathologici' : — 

 I.Garrett: Root Disease Fungi (p. 177, $4.50) 

 2.Horsfall: Fungicides {2nd printing, p. 239, $5.00) 

 3.Fulford: The Genus Bazzania in Central and 



South America (p. 176, $5.00) 

 4. Chester: The Cereal Rusts (p. 270, $5.00) 

 S.Copeland: Genera Filicum (p. 268, $6.00) 

 6.N1CKERSON (ed.) : The Biology of Pathogenic Fungi 



(p. 236, $5.00) 

 7.Frear: Catalogue of Insecticides and Fungicides: 



1, Chemical Insecticides (p. 204, $6.50) 

 8. Frear: Catalogue: 2, Chemical Fungicides and 



Plant Insecticides (p. 168, $5.50) 

 Waksman: The Actinomycetes (in press) 

 Singer: The Agaricales (Mushrooms) (in preparation) 

 Donk: Genera of the Heterobasidiae (in preparation) 



LOTSYA — A Biological Miscellany:— 



I.Murneek, Whyte, et al.: Vernalization and Photo- 



periodism (p. 196, $4.50) 

 2. Knight: Dictionary of Genetics (p. 184, $4.50) 

 Wallace, et al. : Rothamsted International Symposium 



on Trace Elements (in press) 

 Vavilov's Selected Writings, translated by Chester 



(in press) 

 Verdoorn (ed.) : Plant Scientists in War and Peace 



(in press) 

 Verdoorn (ed): Paradisus Arcadiensis (in prep.) 



CHRONICA BOTANICA, The International Plant 

 Science Year Book, founded and edited by Frans Ver- 

 doorn, is available at $7.50, a year, to regular sub- 

 scribers (postfree, foreign and domestic). Subscribers 

 to Chronica receive Biologia (see below) free. 

 Vol. 12 (1948/49) seq. of Chronica, now in press, 

 will be published as single, annual volumes with 

 the following contents: (1) Plant Science Forum; 

 (2) Symbolae Phytohistoricae; (3) International 

 Affairs; (4) Florilegium Botanicum; (5) The 

 Chronicle; (6) Notices and Queries; (7) A good 

 number of special plates. 

 Of the back volumes, volume 8 seq. are available at 

 $7.50 (paper) or $9.00 (buckram), postage extra. 

 Volumes 1-7 may still be had at $9.00 (paper) 

 or $10.50 (buckram). 

 Strong, buckram binding cases, stamped with gold, 

 may be obtained for recent volumes (vols. 4, 5, 6, 

 7, 8, 9, 10, 11/12) at $1.25 (postfree). 



Special issues or volumes of Chronica Botanica avail- 

 able to non-subscribers: — - 



Vol. 8, I.Browne: A Source Book of Agricultural Chem- 

 istry (p. 290, $5.00) 



VoI.8,2.Rafinesque: Life of Travels (p. 72, $2.50) 



Vol. 8, 3. Browne: Thomas Jefferson and the Scientific 

 Trends of his Time (p. 64, $1.25) 



Vol. 9, I.Jack: Biological Field Stations of the World 

 (p. 74, $2.50) 



Vol. 9, 5/6. Howard: Luther Burbank (p. 208, $3.75) 



Vo1.10,1.Saint-Hilaire: Esquisse de mes Voyages 

 au Bresil et Paraguay (p. 62, $2.00) 



Vol. 10,2. Arber: Goethe's Botany (p. 64, $2.00) 



Vol. 10, 3/4. Merrill: Merrilleana — Selected General 

 Writings (p. 266, $4.00) 



Vo1.10,5/6.Wyman : Arboretums and Botanical Gardens 

 of North America (p. 104, $1.50) 



VoI.H.I.Rickett: The Royal Botanical Expedition to 

 New Spain (p. 94, $2.50) 



VoI.ll,2.AsMOUs: Pontes Historiae Botanicae Rossicae 

 (p. 32, $1.25) 



Vol. 11, 3. N. E. Stevens: Factors in Botanical Publica- 

 tion and other Essays (p. 88, $2.00) 



Vo1.11,4.DeTurk (ed.) : Freedom from Want — -A Sym- 

 posium (p. 80, $2.00) 



Vol. 11, 5/6. Reed: Ingenhousz' Experiments upon Vege- 

 tables (in press) 



Vol. 13. Verdoorn (ed.): 21st International Plant 

 Science Register and Directory (in preparation) 



BIOLOGIA, first issued during 1947 to report on 

 international congresses, societies, publications, and 

 related activities in the pure and applied plant and 

 animal sciences, will be published as a small annual, 

 from 1950 onwards, at $1.25. 



PALLAS, a new serial, of which Jessen's Botanik 

 der Gegenwart und Vorzeit (1864/1948, p. 528, $6.00) 

 and Darwin's Voyage with the Beagle (1839/1949, 

 p. 615, $4.75) form the first volumes, will consist of 

 offset reprints of out-of-print scientific classics. As 

 the third volume we propose to publish a collection 

 of noteworthy studies on the development of botany 

 in Scandinavia, to be issued at the occasion of the 

 7th Intern. Botanical Congress. 



Other Chronica Botanica Publications: — 

 Camp, et al.: International Rules of Botanical Nomen- 

 clature (p. 120, $3.50) 

 Finan: Maize in the Great Herbals (p. 60, $3.00) 

 Honig and Verdoorn, et al.: Science and Scientists 



in the Netherlands Indies (p. 491, $4.00) 

 Lindquist: Genetics in Swedish Forestry Practice 



(p. 173, $3.50) 

 Verdoorn, et al.: Manual of Bryology (485 p., $12.00) 

 Verdoorn (ed.): Man. of Pteridology (640 p., $14.00) 

 Verdoorn (ed.): Annales Bryologici (16 vols., $77.50) 

 Weevers: 50 Years of Plant Physiology (p. 280, $6) 



The Chronica Botanica Co., Waltham, Massachusetts, U.S.A. 



— Established in Leyden, Zuid-Holland, in 1933 — Cables: Flora, Waltham, Mass., U.S.A. — 



