230 GENETICS [Bot. Absts., Vol. VI, 



1558. Kotze, J. J. Wood-charcoal and its manufacture. South African Jour. Indust. 

 3 : 423-437. 1920. 



1559. Lovejoy, P. S. Farms vs. forests. Michigan Acad. Sci. Ann. Rept. 21:201-212. 

 1919.— The writer gives in a general way the condition of the 228,509,000 acres of logged-off 

 land in the United States to-day. It has been the custom, especially in Michigan and other 

 lake states, to attempt to replace all cut-over forest lands with farms. The unscrupulous- 

 ness of the professional colonizer and the inability of the home seeker to foresee conditions has 

 caused 4,000,000 acres of land, or 100,000 farms, to be abandoned. The writer suggests that 

 an analysis be made of each cut-over region in order to determine whether the area should 

 be used for general farming, grazing, fruit growing, or reforesting. The real farm and the 

 real forest need not overlap. The writer further emphasizes the general forest conditions 

 of to-day and the urgent need for the reforesting of the logged-off, idle lands. — H. C. Young. 



1560. Rock, Joseph F. One government forest. Hawaiian Forester and Agric. 16: 39-40. 

 PI. 3. 1919. 



1561. Werner, J. Stipendieberetning. [Report from a travelling fellowship.] Tidsskr. 

 Skogbruk 28: 108-117. 1920.— Observations on plantations and forest conditions near 

 Bergen and Stavanger on the west coast of Norway. — /. A. Larsen. 



1562. Young, L. J. A study in the difference in soil requirements of pine and spruce. 

 Michigan Acad. Sci. Ann. Rept. 21: 219-221. 1919.— This article points out the importance 

 in forest plantings of a proper consideration of site condition and species to be planted. 

 In the Saginaw Forest there is an area where spruce has been making a poor growth for 15 

 years. The surface soil has been badly washed and is also very poor in the necessary ele- 

 ments. This is taken as the reason for the unusually poor tree growth. Pine is said to demand 

 less from a soil in order to make the same growth; so pine was planted some 4 years ago among 

 the spruce. Since pine trees grow relatively slowly during the first 5 years, there has not 

 been sufficient time in this experiment to show how well they can do; but the Scotch pine 

 averages a foot taller in 4 years than the spruce in 15 years. The Scotch pine is more adapt- 

 able, therefore, for this site and should have been planted originally. Other species of pine 

 were planted also. More complete results will be forthcoming in 4 or 5 years; more definite 

 conclusions can be drawn from these. — R. P. Hibbard. 



GENETICS 



G. H. Shull, Editor 

 J. P. Kelly, Assistant Editor 



1563. Abidin, J. Pferdezucht und Pferderassen im osmanischen Reich. [Horse breed- 

 ing and the breeds of horses in the Turkish Empire.] Flugschr. Deutsch. Ges. f. Zuchtungs- 

 kunde 42: 1-31. 47 fig. 1918.— This paper goes briefly into the history of military horse 

 breeding in Turkey and describes the breeds of horses found in the Old Turkish Empire. 

 The sub-breeds of the Arab horse, the customs connected with horse breeding, and the beliefs 

 held by the Arabs in regard to heredity are discussed in most detail. — Sewall Wright. 



1564. Adamson, R. W. The Bartram oak. Sci. Amer. 122:301. 1920.— Confirmatory 

 comment on Arthur Hollick's article, "The story of the Bartram Oak," Sci. Amer. 121: 

 422. 1919. "From time immemorial" common comment in the South, where these hetero- 

 phyllous oaks are abundant, is that they are willow oak X red oak hybrids. Natural progeny 

 of southern heterophyllous oak shows large numbers of classes based on leaf form. [See 

 Bot. Absts. 4, Entry 615.]— J. Ben Hill. 



1565. Akerman, A. Speltlike bud-sports in common wheat. Hereditasl: 116-127. 6 

 fig. 1920. — Two spikes were chimaeras, conditioned by a speltoid heterozygote and its corre- 

 sponding normal type, of which the latter formed the greater part of the spikes, while the 



