A companion to Blackie's tropical readers, books I and II - containing suggestions for experiemnts and practical work (1911) (14772656995)

Identifier: companiontoblack00wort (find matches)
Title: A companion to Blackie's tropical readers, books I and II : containing suggestions for experiemnts and practical work
Year: 1911 (1910s)
Authors: Wortley, E. J
Subjects: Nature study -- Juvenile literature Natural history -- Tropics Natural history -- Jamaica
Publisher: Glasgow Bombay : Blackie
Contributing Library: The LuEsther T Mertz Library, the New York Botanical Garden
Digitizing Sponsor: The LuEsther T Mertz Library, the New York Botanical Garden



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taken by teachers who undertake workof this nature. Some of the reagents are highly corro-sive, e.g. nitric acid, sulphuric acid; phosphorus takesfire when exposed to the air; sodium is highly dangerousif put into water in too large quantities; and hydrogenand oxygen make an explosive mixture. Further, manychemicals are poisonous, and the greatest care has to beexercised in storing them. Children should never beallowed to handle them by themselves, and they arebest kept under lock and key. Glassware should begently handled to avoid breakage. Cost.—If full use be made of such substitutes as canbe obtained, the cost of this work will amount to verylittle. Five shillings, it is estimated, will enable theteacher to buy sufficient apparatus to keep the workgoing, while for ten shillings he can be thoroughlyequipped. If there were a regular demand for appa-ratus some local firm of importers would doubtless bewilling to make arrangements to keep a stock of justwhat teachers might require.
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