38 SC; MISSOURI BOTANICAL GARDEN BULLETIN 
relatively the degree of pollution of air in closed public con- 
veyances, in factories, etc., especially by the presence of cer- 
tain common indicator bacteria. 
A representative of the Illinois State Laboratory of Nat- 
ural History, Mr. R. E. Richardson, has been spending some 
months at this laboratory engaged upon a study of biological 
material collected in the Chicago Sanitary Canal and Upper 
oe aie River, preparatory to an extensive report upon that 
subject. 
In general it may be said that the field now covered by the 
investigations undertaken at the Garden is a very broad one, 
and the details of the work can only be apparent through the 
articles published. It may be well to state that the general 
attitude of the research staff toward the types of problems 
for investigation is a broad one—no legitimate scientific 
- prob! is too practical or too abstract. There is no reason 
why an investigator connected with the laboratory should 
not equally well study “How to produce a new rose” or 
“Correlation and segregation phenomena in rose hybrids”; 
“How to store vegetables and fruits” or “Respiration and 
changes in tissues preserved at low temperatures.” 
One evening a week is devoted to a Seminar comprising 
members of the staff and graduate students, who report upon 
their work and endeavor not only to correlate their efforts, 
but likewise to follow and discuss the progress of cognate 
studies in other scientific laboratories. The Engelmann 
Botanical Club, which has been in existence more than a 
decade, holds monthly meetings in the laboratory building, 
and the membership of this body has increased during the 
present year. This Club is designed to bring together for 
mutual benefit all those in the city who have general pro- 
fessional or scientific interest in botany. 
HINTS ON LAWN-MAKING IN ST. LOUIS 
No one thing so adds interest and charm to a landscape 
_as a well-proportioned lawn. Given‘a good stretch, it is com- 
music simple to add flowers and shrubs in pleasing com- 
ination, but without the grass it is impossible to secure the 
restful effect so much desired in any scheme of planting. 
This principle is well known, and a lawn properly made and 
maintained is re ized as being the key to the satisfactory 
setting of any building, be it small house or most pretentious 
public structure. The efforts of the gardener are not always 
