238 
Utilization of sewage, sixth report on the 
treatment and, 200. 
Vivian (E.) on the exploration of Kent’s 
Cavern, 1. 
Watts (Dr. W. M.) on the teaching of 
physics in schools, 71; on preparing 
and printing tables of waye-numbers, 
241, 
Wave-numbers, report of the committee 
appointed to prepare and print tables 
of, 241, 
Weights and measures, report on the 
best means of providing for a uni- 
formity of, with reference to the in- 
terests of science, 359, 
West (Mz.) on the nature of intestinal 
secretion, 54, 
REPORT—1874. 
Willett (H.) on the Sub-Wealden ex- 
ploration, 21. 
Williamson (Prof. A. W.) on the treat- 
ment and utilization of sewage, 200 ; 
on Mr. Siemens’s pyrometer, 242; on 
the best means of providing for a uni- 
formity of weights and measures, with 
yeference to the interests of science, 
359. 
Wilson (J. M.) on the teaching of 
physics in schools, 71. 
Woodward (C. J.) on the erratic blocks 
of England and Wales, 192. 
—— (H.) on the Sub- Wealden explora- 
tion, 21; on the structure and classi- 
fication of the Labyrinthodonts, 149. 
Wright (Dr.) on the chemical constitu- 
tion and optical properties of essential 
oils, 17, 
ee 
INDEX I. 
TO 
MISCELLANEOUS COMMUNICATIONS TO THE 
SECTIONS. 
[An asterisk (*) signifies that no abstract of the communication is given. ] 
Abney (Capt.) on photographic opera- 
tions connected with the transit of 
Venus, 19; on the reproduction of 
maps and plans in the field, 183, 
Absorption of the sun’s heat-rays by the 
vapour of the atmosphere, Rey, F’, W. 
Stow on the, 39. 
Acids, Prof. G. Wiedemann on the pro- 
portions in which bases and, present 
in a solution combine with each other, 
32 
Africa, Dr. G. Nachtigall’s explorations 
in (1869-74), E, G, Rayenstein on, 
175. 
Agaw race in Caucasia, Africa,and South 
America, Hyde Clarke on the, 146, 
Airy (Dr. H.), note on variation of leaf- 
arrangement, 128. 
Akka and Pygmy languages of Africa, 
Hyde Clarke on the classification of 
the, 147. 
Alecto and Hippothoa from the Lower 
Silurian rocks of Ohio, description of 
species of, with a description of Awlo- 
pora arachnoidea, by Dy. H.A. Nichol- 
son, 90. 
Allman (Prof.) on some points in the 
histology of Myriothela phrygia, 135, 
* Ampelidee, Prof. Lawson on structural 
peculiarities of the, 134, 
Anderson (Capt. S.) onthe demarcation 
of the international boundary between 
a 
