 The fluid used is glycerine, in a maximum state of purity, which has a specific gravity of 1 '26, or about one tenth that of mercury. It has the advantage of giving a vapour of very low tension in the Torricellian vacuum from its high boiling point, and...  Symons's Monthly Meteorological Magazine - Page 861876Full view - About this book
 | Scientific apparatus and instruments - 1876 - 957 pages
...advantage of giving a vapour of very low tension in the TorriceUjan vacuum from its high boiling point, and is therefore free from the masking effect of back...barometer. The fluctuations of the column are observed in a gl»*' ttbe of 1 inch sectional area, or 100th that of the cistern. The tube forming the body of the... | |
 | Royal Society (Great Britain) - Electronic journals - 1880 - 624 pages
...have also sanctioned the taking of a series of observations to extend over a period of twelve months. The tube forming the body of the instrument is an ordinary composition metal gas-pipe, £ths of an inch internal diameter, and furnished at the top with a gun-metal socket,... | |
 | The National Life-boat Institution - 1883 - 714 pages
...petroleum oil, thus neutralizing its absorbing tendency, while the atmospheric pressure remained intact. The tube forming the body of the instrument is an ordinary composition metal gas-pipe, three-eighths of an inch internal diameter, and furnished at the top with a gun-metal... | |
 | Victoria and Albert Museum - Magnetic instruments - 1900 - 72 pages
...the Torricellian vacuum from its high boiling point, and is therefore free from the masking effect ot back pressure which interferes with the indications...body of the instrument is an ordinary composition gas pipe, | in. diameter and 27 feet long, placed in the well of the staircase, between the upper and... | |
| |
