The senses, their division and work : viewed physically and evolutionally / by Henry Muirhead.
- Muirhead, Henry.
- Date:
- [1877]
Licence: Public Domain Mark
Credit: The senses, their division and work : viewed physically and evolutionally / by Henry Muirhead. Source: Wellcome Collection.
Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.
17/18 page 334
![as those Dr. Mnirhead had made were of great value, and this was specially true of those into the mechanism of sensory impressions, I and into the more obscure actions of the nervous system. Pondered i over and studied in all their bearings by thinkers, these investiga- 1 tions would assist in laying the foundation of a sound psychology. XXXIII.—On New Chromium and Manganese Compounds. By J. B. Hannay, F.R.S.E. [Read before the Chemical Section, March 26, 1877-] While studying chemistry, and more especially when reading researches relating to the fundamental principles of the science, i the fact has again and again been forced upon my notice, that the it science of chemistry has been led along one particular line by the 1 force of circumstances; and that of a great number of chemical j ♦systems that are possible, chemists have, as would be expected, j fallen into that which was nearest to hand. As chemistry is a science tl which has sprung up naturally with the growth of the inquiring J faculty in man, it was to be expected that the science would follow, in its principal lines, the state of things naturally existing. The chemist works in an atmosphere which contains moisture, and all | the substances he finds on this earth have been subject to the action !l of water; in which compound he finds his most valuable ally in | dissolving substances, in order that they may act intimately upon each other. Thus the chemist has, by force of circumstances, been compelled, or we may say led, to build up an elaborate system of bodies, either directly soluble in, or prepared from substances soluble in water ; so that nearly every chemical compound we know j of has been cast in this great water mould, or made from substances which have received this stamp. Thus we have an enormous system of water chemistry ; and what wonder that chemists used water as a type on which to frame the decompositions and combinations of dynamical chemistry, by means of rational formulae, when the whole l system had been carefully modelled upon that compound ? Then, if we look over any general list of carbon compounds, we are at once struck with the fact that, however complicated the ! compound may be, it is, not as a rule, decomposed by water, but is in fact genei’ally soluble in it; but if we take complicated compounds](https://iiif.wellcomecollection.org/image/b24761916_0020.jp2/full/800%2C/0/default.jpg)
