Studies in vocational diseases. I-II / by J.W. Schereschewsky ; prepared by direction of the Surgeon-General.

  • Joseph W. Schereschewsky
Date:
1915
Catalogue details

Licence: Public Domain Mark

Credit: Studies in vocational diseases. I-II / by J.W. Schereschewsky ; prepared by direction of the Surgeon-General. Source: Wellcome Collection.

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    TaBLe 45.—Average dry and wet bulb temperatures and relative humidities in shops of the garment trade. [Based on Rogers’s data.] Average | Average Average Num- | Number o Average ea Type of shop and time of year. | ber of | of obser- ee a pak depres- ante shops. | vations. | — ; de’ amet sion. ity. ee Gae Degree. | Per cent. Modern loft building, February- 44 244 | Steam- 64. 34 53. 35 10. 74 50 April. heat. Old-type loft building, February- 43 138 | Stoves... 61.2 Dose 8.9 54 April. Converted tenement, March-April 8 30 |...do. 61.9 52.3 9.6 52 Converted dwelling, March-April. 7 PRINS eR Ole 64. 52 56. 4 8. 12 60 Cellarshop.- aprile: . cece eee eee 3 | O78 | Bae (8) 64. 0 62.3 Af §2.3 | r 2 a See General average........-.-. 105 447 | EAI 63.2 54.4 9.8 52 It will be seen from this table that the average dry-bulb temperature in 105 shops was 63.2° F., and the average wet-bulb temperature was 53.4° F. This corresponds to an average relative humidity of 52 per cent. This is by no means low and is probably well in excess of the average relative humidity prevalent in many dwellings during the winter months. Indeed there are a number of sources of moisture in workshops not operative in the home. A certain amount of water vapor is derived from the combustion of gas in gas jets and pressing irons; a number of filled fire buckets are present in various locations; moisture is generated from damp pressing cloths and also exhaled from the workers. All of these tend to keep the air fairly moist. It is also seen from the table that, while the relative humidities are not low, the dry-bulb temperatures are by no means high. In fact in some shops heated by stoves the dry-bulb temperatures were too low, being below 60° F. in anumber of instances. Under such circumstances catarrhal conditions might be made worse in sedentary workers, coldness of the hands and feet tending to cause congestion of the nasal mucous membranes. | | While the average relative humidity from Rogers’s data was found to be over 50 per cent, his figures were examined further for the occur- rence of low relative humidities. The following table shows for 427 observations the distributions of the relative humidities observed: TABLE 46.—Distribution of relative humidities, shops of the garment trades. [Rogers’s data. ] Number Number Relative humidity (per cent). of Per cent. || Relative humidity (per cent). of Per cent. instances. instances. PEGONO MS. 22S lees oer oot e-ede 4 ORGS NGO TOO4 ices 24 erect adage cee 56 13.10 Ds or ak axa Steg Nace ene pa eae ph 8 OOM MOO CO OO vol canoe toes bee eee 39 9.13 ZSUOR2 9G Sea ee iV Se COCO tO) (42 es oe pee a ts ete 22 6,45 SOMO Sachs eects ees ene tee 29 6.8 LORUOMO Saroteee caisce see ee eee 21 4,91 SOUOLOY ss 2s See eee 44 10231180 40-84e see seeds ines eetneSe 3 aah ADO: Aras oo iA eek cee ge 42 OS O2 all OORUORSO sete s aire SP ee epee See 1 Aver GB REO EO he 3 pa Se at ES ere 46 LOS FO AGO NOLO S a eta aca so aije x Zane a - 1 aye SOON Foot OOS eee See etn 54 12.65 DOGO SO os tizin a cs do ene Se 42 9. 82 ORAS a kin cent Phe AD) es sieee ae
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