Report on the air of Glasgow : with tables of wind, temperature, and rain-fall, for the six months, November, 1877, to April, 1878 / by E.M. Dixon in co-operation with the Medical Officer of Health ; with explanatory remarks by Wm. J. Dunnachie.

  • Glasgow (Scotland). Sanitary Department.
Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: Report on the air of Glasgow : with tables of wind, temperature, and rain-fall, for the six months, November, 1877, to April, 1878 / by E.M. Dixon in co-operation with the Medical Officer of Health ; with explanatory remarks by Wm. J. Dunnachie. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    5/22
    MR. DIXON’S EXPLANATORY REMARKS.1 The accompanying Tables fall under two classes, one of them containing the Tables which state the average amounts of certain substances existing in 100 cubic feet of air at the places and during the times specified, and the other containing Tables explanatory of the former, and referring either to the results of special investigations or to meteorological conditions existing during the times and at the places in question. Regarding the results of analysis contained in the Tables of the first class, it is sufficient to state here that at each of the stations therein mentioned the air is drawn by aspiration, and continuously for two or three days in several distinct currents through as many distinct solutions, each of which is adapted to withdraw a special substance from the current of air which passes through it ; that the amount of air which passes in each current is measured by means of a special gas meter, through which that current subsequently passes; and that the amount of the substance which is specially absorbed from each of the air currents is finally determined by a method sufficiently delicate for the estimation of quantities that in most cases would be called “traces.”2 The object of the Tables of the second class is, as already stated, to supply all the information that may be available, or that may appear to be necessary, for correctly interpreting the analytical results in the Tables of the first class. The portion of these Tables relating to changes in the direction and velocity of the wind, and also that relating to the average temperature during the days to which each of the analytical results refers, will continue to be supplied by Professor Grant of the Glasgow Observatory, from the results •obtained there by self-recording apparatus.3 *** ***** The Tables of the first class are numbered, and slio.v the results obtained with respect to the following substances, viz.— Table I.—Carbonic Acid. ,, IT.—Sulphur in combination. „ III.—Chlorine free and combined. „ IV.—Nitrogen in the form of Ammonia. ,, V.—Nitrogen in the form of “ Albumenoid Ammonia.” Unless the opposite is expressly mentioned, all the numerical and other statements in the Tables must be understood to refer, not exclusively to the day indicated by the corresponding date, but to the interval between noon of that day and noon of the day indicated by the date immediately preceding. [* Certain portions which are explanatory of work projected but not carried out are omitted.] [2 See Mr. Dunnachie’s Explanatory Remarks.] [3 The Rain-fall and Temperature observations have been obtained from the Scottisli Meteorologicoal Society’s Station 442 Sauchiehall Street.]