The Light Of The Seven Seas
The Story Of Vaclite

THE LIGHT OF THE SEVEN SEAS ■iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiniiiiitiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiniiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiliiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii CLOSE QUARTERS Vaclite lamps in use in tunnel shaft of dredge “Partuti,” owned by New Plymouth Harbor Board, New Zealand Nor are the limitations of modern illuminants confined to the Seven Seas. They are present on land in many varying phases. In outlying districts, the cost of electricity or gas lighting may be prohibitive. For mines, foundries, warehouses, brew- eries—the large investment necessary for electric or gas-lighting equipment may make the use of these illuminants impractical. Animal and Vegetable Oil Illuminants In supplying the demand for illuminants other than elec- tricity and gaseous compounds, animal and vegetable oils were considered for many years best suited to the purpose. Experience has demonstrated, however, that at certain times and under certain operating conditions these oils , \i j ' X do not give the desired results—in fact are un- ' ' ‘ satisfactory in many respects. .//'..Most of them are expensive. Others have low /illuminating properties and give poor candle ■^fotyer. Practically all emit disagreeable odors and /dhoking smoke, rendering them unfit for use in /confined places such as coal bunkers, boiler rooms, 4