No. 1, October, 1920] PATHOLOGY 31 



to bending by strong wind, quickly followed by the regeneration of the injured tissue. Ten- 

 sion on the windward side of the trunk results in square breaks in the bark, accompanied by 

 vertical slits and the separation of a strip of bark from I lie wood. The cambium produces new 

 bark under this old loose layer, which later falls off. In one case new tissue was also formed 

 on the inner surface of the loosened bark. False annual rings ascribed to wind bending are 

 illustrated by photographs. — F. Cramer. 



219. Bioelow, W. D. Heat penetration in canned foods. [Abstract.] Absts. Bact. 4: 

 11. 1920. — A pyrometer was described adapted to use in commercial canning plants in deter- 

 mining the temperature of the center of sealed cans. Heating curves were shown giving the 

 relative heat penetration of typical foods and illustrating the influence of consistency of the 

 product, initial temperature, and size of cans, on heat penetration. The use of rotating ster- 

 ilizing machines was also discussed and the influence of different speeds of rotation of the can 

 on the heat penetration was shown by means of appropriate curves. [Author's abst. of paper 

 read before Soc. Amer. Bact.] 



220. Brandes, E. W. Artificial and insect transmission of sugar-cane mosaic. Jour. 

 Agric. Res. 19: 131-138. 1920.— Mosaic disease of sugar-cane was communicated to healthy 

 plants in greenhouses near Washington by hypodermic injections, at growing points, of 

 expressed juice from diseased plants. — A-phis maidis also proved to be a carrier of the virus. 

 Seed transmission is not definitely established. — D. Reddick. 



221. Chipp, T. F. A host index of fungi of the Malay Peninsula. Gardens' Bull. Straits 

 Settlements 2 : 231-23S. 1920.— An alphabetical index of hosts, with all fungi hitherto recorded 

 for them in Malaya. — T. F. Chipp. 



222. Chipp, T. F. The fungus flora of Hevea brasiliensis. Gardens' Bull. Straits Settle- 

 ments 2 : 186-192. 1920.— An enumeration of all fungi recorded in Malaya for the Para rubber 

 tree; 67 species are mentioned. — T. F. Chipp. 



223. Clinton, G. P. Inspection of phaenogamic herbaria for rusts on Ribes sp. Connecti- 

 cut [New Haven] Agric. Exp. Sta. Bull. 214: 423^27. 1916-1917.— Specimens of Ribes, includ- 

 ing Grossularia, from 8 eastern and 3 western herbaria were examined. No light w r as thrown 

 on the early occurrence of Cronortium ribicola, but information was obtained on distribution 

 of three other rusts in U. S. A. These are Aecidium Grossulariae, Coleosporium ribicola and 

 Puccinia Ribes. The distribution of each is given. — Henry Dorsey. 



224. Clinton, G. P., and L. F. Harvey. Co-operative potato spraying in 1917. Con- 

 necticut [New Haven] Agric. Exp. Sta. Bull. 214: 411-420. 1917.— These were potato-spraying 

 experiments in which 4-4-50 Bordeaux mixture was applied. Hot weather on three days 

 the last of July and the first of August prematurely killed the vines in August in two fields 

 and injured them in two more fields. Trampling the vines in one field caused positive 

 injury before there was time for effect of spraying to show. — Two fields were benefited about 

 enough to pay expenses. In a fourth field there was an increase of 18 bushels. In the fifth 

 field the increase due to spraying was 95 bushels, which was very much in excess of cost. — 

 Henry Dorsey. 



225. Clinton, G. P., and Florence A. McCormick. Infection experiments of Pinus 

 strobus with Cronartium ribicola. Connecticut [New Haven] Agric. Exp. Sta. Bull. 214: 

 428-459. PL 37-43. 1916-1918.— The history of the introduction of the disease into the 

 state is given. Various' attempts to infect stems, buds and leaves are described, the inocula- 

 tions being made with plants in Petri dishes, in greenhouses, under tents and in the open. 

 One-, two-, and three-year seedlings were tested. — The results of the inoculations indicate that 

 infection occurs from late summer to late fall through the leaves only. Inconspicuous, yellow- 

 ish spots are produced at the point of infection. These become apparent in the following 

 early summer. Later there is invasion of the stem causing slight swelling and discoloration. 



