52 REPORT—1858. 
The water from Mr. Ripley’s artesian well, Holbeck, contains the largest amount 
of carbonate of soda, viz. 45 grains per gallon. It also contains ammonia, sulphide, 
iodide, and bromide of sodium. 
This water I selected for a complete analysis, which shows one gallon to be of the 
following composition :— 
Saline constituents—Carbonate of lime .... 2:°151 
Ah magnesia, 1:023 
” ION. se his OOo 
” soda .... 45°620 
4 ammonia.. 0°045 
Sulphate of potash .,  1°303 
Chloride of sodium ,, 52°123 
Sulphide of sodium ,, 0°740 
Todide of sodium..., 0°022 
Bromide of sodium ., trace 
Silicate of soda..,... 1°312 
NICH Ase eee Rercieeae MO OL 
Alumina. rn sieauin yO LOO 
Organic matter...... 0°227 
Total in 70,000 grains............ 105°292 grains. 
This water also contains carbonic acid gas, nitrogen, and sulphuretted hydrogen; 
a large amount of carburetted hydrogen is evolved at its source. 
Some Account of Professor Schdnbein’s latest experiments on the Allotropic 
Conditions of Oxygen. By H. Bence Jones, M.D., F.RS, 
On an Instrument for Measuring the Constant Intensity of Ozone. 
By Evwin Lanxester, M.D., PRS. 
This instrument consisted of two small roliers included in a box, which were moved 
by means of ordinary clock-work. Over the roller, a strip of paper, prepared with 
iodide of potassium and starch, is allowed to revolve, the paper becoming exposed to 
the air for an inch of its surface, in the lid of the box. ‘Twenty-four inches of paper 
pass over the rollers in the course of the twenty -four hours, which thus registers by its 
colour the intensity of the action of ozone in the atmosphere. By this instrument 
the intensity of the ozone for every hour in the twenty-four could be registered, and 
minima and maxima with an average be ascertained. ‘The register of ozone could also 
be compared with those of the anemometer, and the relation of ozone tothe direction 
and force of the wind ascertained. Dr. Lankester pointed out the importance of 
ascertaining the presence of ozone, on account of its undoubted relation to health, 
He drew attention to a series of tables which had been drawn up from the registra- 
tions of the anemometer made at London, Blackheath, and Felixstow, on the coast of 
Suffolk. From these it was seen that the relation of these three places were as 0-22 
and 55. The instrument acted also as a clock, and the time could be accurately marked 
upon the ozonized paper. 
On the Annual Yield of Nitrogen per Acre in different Crops. 
By J.B. Lawes, F.RS., £.GS., and J. H. Girzert, PhD., F.C.S. 
In a paper given last year at the Dublin Meeting, on the question of the assimila- 
tion of free nitrogen by plants, and some allied points*, the authors had stated in 
general terms, that the amount of nitrogen yielded per acre, per annum, in different 
crops, even when unmanured, was considerably beyond that annually coming down, 
in the forms of ammonia and nitric acid, in the yet measured and analysed aqueous 
deposits from the atmosphere. The investigations then referred to were still in pro- 
gress; and a desirable introduction to the record of the results would obviously be, to 
* Preliminary Notice of Researches on the Assimilation of Nitrogen by Plants. By 
Messrs. Lawes, Gilbert, and Pugh. 
