File:Scientific news for general readers; a popular illustrated weekly journal of science (1887) (14763564702).jpg

Identifier: scientificnewsfo11887lond (find matches)
Title: Scientific news for general readers; a popular illustrated weekly journal of science
Year: 1887 (1880s)
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Publisher: London
Contributing Library: Smithsonian Institution Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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negative by demonstrating in any particular case thatno person could have dropped a match is, of course, im-possible. It would be interesting to make an experiment in someplace where no harm could accrue, and carefully note therise of the thermometer and the other phenomena pro-duced. It would take us too far were we to enumerate all thesubstances which may possibly take fire spontaneously,with or without explosion. We will only mention oneclass of such bodies—the mixtures for coloured fires asused by pyrotechnists. Some of these, if prepared inquantity and kept in stock for some time, have been knownto become ignited. Hence, follows the practical conclusionthat fireworks should not be manufactured or even stored inquantity in any building situated near to dwelling-houses orto public thoroughfares. It is not pleasant to reflect thatyour property and your person may at any moment beplaced in jeopardy by a slight oversight on the part of aneighbour. i6o SCIENTIFIC NEWS. (3ept. 1st, iS
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•Exhibition «ve:H- ^„, ^^^f^^ Sept. ist, 1S87.) SCIENTIFIC NEVV^S. 161 ZOOLOGICAL NOTES AT THE AMERICANEXHIBITION. OF great zoological interest is the collection of mountedheads and horns, etc., forming part of the AmericanExhibition at Earls Court, as it gives to the scientific zoolo-gist and the collector a rare opportunity of making thosecomparisons which are so necessary to estimate the relation-ship of certain more or less fixed zoological characters; for,as is well known, it is only by the comparison of numerousexamples or specimens that it can be correctly ascertainedhow far they can be relied upon for systematic purposes ;if they vary, in which direction, whether by excess ofdevelopment in the case of very many pointed horns wherethe normal type is simple, or bj arrested growth (except byaccidents), as in the case of unequally developed horns, onthe same head. Such a collection as this enables us toascertain how far our museums (whose teaching value is sotardily recognise

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