DECEMBER] 
Price Is. 
[1891. 
TRANSACTIONS 
OF THE 
HERTFORDSHIRE 
NATURAL HISTORY SOCIETY 
9 
AND 
FIELD CLUB. 
EDITED BY JOHN HOPKINSON, F.L.S., F.O.S. 
VOL. VI. PART 6. 
contents: pagh 
Conclusion of the President’s paper on Water and Water-supply. 161 
19. The Application of Photography to Meteorology. By Arthur W. Clayden, 
M.A., F.G.S., F.C.S., F.R.Met.Soc.;. 162 
20. Meteorological Observations taken at The Grange, St. Albans, during the year 
1890. By John Hopkinson, F.L.S., F.G.S., F.R.Met.Soc., President. 169 
21. The Percolation of Rain through comparatively Light and through com¬ 
paratively Heavy Soil. By Edward Mawley, F.R.Met.Soc., F.R.H.S..... 175 
22. Report on the Rainfall in Hertfordshire in 1890. By John Hopkinson, 
F.L.S., etc...... 179 
23. Climatological Observations taken in Hertfordshire in 1890. By John 
Hopkinson....^......... 187 
24. Report on Diseases of Plants in Hertfordshire in 1890. By A. T. Brett, 
M.D.............. 191 
25. Miscellaneous Notes and Observations.—Meteorology; Botany; Zoology. 193 
LONDON: ' 
GURNEY & JACKSON, Successors to VAN YOORST, PATERNOSTER ROW. 
HERTFORD: 
STEPHEN AUSTIN AND SONS, PRINTERS, FORE STREET. 
