ey er mee ee tet 
Thirty-fifth Annual Meeting 363 
Some Factors Influencing the Development of Venturia Inequalis. 
(IG) ratio, tee Gath eee Cr Rit aE acy oni are a Se H. C. Youne 
Degeneration of Potatoes in Ohio. (15 min.) (lantern)...... Pau E. TILtForD 
Effects of Lightning on the Trunk of Platenus Occidentalis. (5 min.).... 
JouN H. SCHAFFNER 
The Microchemistry of Flax Fiber Formation. (10 min.) (lantern)...... 
DonaLp B. ANDERSON 
Some Fresh Water Algae from Fukien, China. (5 min.)..... L. H. TIFFANY 
Pre-Staining in Histological Technique. (10 min.)............ Cuas. H. Ortts 
The Seasonal Development of Apple Scab in Central Ohio a 1924. 
Og rtm) in (lantern) er rmeewe ne 400. ie cecal. teplocee etch H. JOHNSON 
ithe: Genus, Ocdoronitum: (lS maim.) -......-...--22.-2--.--- We a TIFFANY 
Experiments on the Control of Apple Scab in Central Ohio in 1924. (10 
Militias (MATLUCTI) S axcnire onde oon oa © ine W. G. Stover and H. W. JoHNson 
Some Mississippian Physiography of Northeastern Ohio. (25 min.)..... 
G. F. LAMB 
Peneplains and Straths in Southern Ohio. (15 min.).......... WiLBur Stout 
Peneplains in Muskingum County, Ohio. (10 min.).......... G. W. ConrREY 
The Uplands of Jefferson County, Ohio. (5 min.)........... R. E. LAMBORN 
A Method of Estimating Post-Glacial Time. (10 min.) (lantern)...... 
ALLYN C. SWINNERTON 
Geologic Structures in Southern Vermont. (15 min.)..... Gro. D. HuBBARD 
limestone, Caves in Ohion(1Oimine)). 6 2......252...200.--- .GEO. W. WHITE 
The Areas of Distribution of Paleozoic Seas in the Arctic Regions of 
North America, Europe and Asia, in Connection with the Problem of 
CGircumpolanceas. (Uoimmm- ko. .2 aocacsee su ss. snot ees oat AuG. F. FOERSTE 
Difference in Niagaran Faunas Due to Development in Distinct Arms of 
the Sea, in Connection with the Cincinnati, Kankakee, LaSalle and 
Other Anticlines. (15 TUTTI) Reese Naas oats forces eRe ee aoe A\uG. F. FoERSTE 
JN 1D yigaleal bt nae ( (Ris walrh oly) eye gene eae ae eee ane ae ee ae G. F. LAMB 
Some Recent Deep Wells in Ohio. (15 min.)....°.........: ee\c Boe NOCKER 
Dip and Expansion of Deep-seated Rocks in Eastern Ohio. (10 min.).... 
WIL ae STOUT 
The Members of the Monroe and their Distribution in Ohio. (15 min.). 
J. ERNEsT C ARMAN 
Some Striking Features of the Lower Mercer Limestone in Mahoning 
County (8 min.) (Introduced by Prof. G. F. Lamb)..... EpwIn J. BOoGNAR 
A Suggestion in Teaching Economic Geology. (5 min.)..... Gro. D. HUBBARD 
ithe Scrub ‘Grass Coal im-Ohio. (lOmin)... 2 -5...-......-2--- WILBUR STOUT 
The Laws of Motion Under Constant Power (10 min.) (lantern) L. W. TAYLor 
A Precision Determination of the Acceleration of Gravity. (10 min.) 
(Cicer fess) es Os ec rie oA Ra Rd ey Soy H. HucH Wr.is 
A Quantitative Measurement of the Change in Intensity in Radio Signals 
During the Transition from Daylight to Dark. (15 min.) (lantern)... 
C. E. HOWE 
DEMONSTRATIONS 
Specimens to Illustrate Paper No. 26\...:./.......0..003..- SAMUEL W. CHASE 
Grey Squirrel Killed by Excessive Growth of Incisor Teeth..... E. W. SCHEAR 
Drawings of Forster’s Types of Odonata............ CLARENCE H. KENNEDY 
Iron Bacteria from Yellow Springs, Ohio.. A. C. SWINNERTON and O. L. INMAN 
The Mateer Embryo. Presomite Human Embryo-Twin. (Slides and 
INIOCEIS) Retae semree rae enero as, nae loins vei Sarees, saps ss ote fe H. N. MATEER 
One Cause of the Failure of Canada Thistles to Produce Seeds..FREDA DETMERS 
Progress of the Common Barberry Eradication Campaign, 1918—1924.... 
JoHN W. BARINGER 
Slides Showing Musculature of Appendages in Hexapoda...... L. B. WALTON 
iBiolocicalmiecord: (Candie. seme errr minnie fdas teeters ise) L. B. WALTON 
