- 
MISSOURI BOTANICAL GARDEN BULLETIN 15 
however, indications respecting the nature of the thesis prob- 
lems under investigation by assistants, fellows, and other 
graduate students. 
G. W. Freiberg. An investigation of the physiological- 
chemical relations of the mosaic diseases of tobacco, cucum- 
ber, and other plants, with special reference to the nature 
of the disease and the tissue changes induced by it. 
S. M. Zeller. Studies dealing with the problem of condi- 
tions determining durability in wood, with special reference 
to the relation of resin content and density to fungous attack ; 
likewise an investigation of the enzyme activities of certain 
wood-destroying fungi, and the correlation in timber between 
strength and resistance to fungous attack; and an investiga- 
tion of ferrous chloride as a possible preservative of timber. 
H. M. Jennison. Comparative studies of a number of 
strains of bacteria inducing black leg of potato. 
W. W. Bonns. Studies on the effect of narcotization on 
the enzyme activities and respiration of such resting organs 
as potatoes, bulbs, seeds, ete. 
W. S. Reeves. Investigation of the effects upon certain 
plants of over-feeding with, or deficiency in, certain mineral 
nutrients, with a view to the discovery of diagnostic indica- 
tions for any particular effect. 
J. W. Severy. The relation of temperature and humidity 
in the infection of plants with certain parasitic fungi. 
D. C. Neal. Investigation of some phases of parasitism 
in the anthracnose of cotton and other anthracnoses; also 
certain rots of fruits and the conditions influencing their 
prevalence. 
L. J. Pessin. The rdle of chemotropism in the infection 
of certain hosts by parasitic fungi. 
H. Schmitz. The activity of bacteria in relation to cellu- 
lose fermentation and, in particular, to the decay of timber; 
also a comparative study of the conjoint action of different 
organisms in decay. . 
I. C. Hoffman. The effect of spraying on the set of fruit 
in cucumbers. 
A. Lurie. A morphological study of the changes involved 
in the differentiation of chromoplasts. 
Lucy D. Foote. A comparative histological study of cer- 
tain representatives of the Ranunculaceae. 
Alice Pickel. A systematic study of the genus Loeselia (a 
member of the Phlox family, Polemoniaceae). 
Publications and Pa ers.—In the list below are included 
titles of all papers published during the year as a result of 
investigations and B teem csc made in the laboratories, her- 
ms 
