A still stronger proof is afforded by the "_avidity_" of Thomsen or
the "_affinity_" of Ostwald; both have worked on the subject, taking
no account of water of crystallization, and the results, e.g., for
H_{2}SO_{4} and HCl with NaHO, where water of crystallization _may_
come in, are entirely confirmed by Ostwald's results on inversion and
etherification, where there can be no water of crystallization.
The proof is complete, water of crystallization cannot be attached to
the salt in solution, or if it is, no heat is evolved on union more
than with solvent water. The alternative is to suppose that the whole
of the above thermo-chemical results are coincidences.
* * * * *
ALPINE FLOWERS IN THE PYRENEES.
Bagneres De Luchon, in the department of the Haute Garonne, is a gay
town of some 5,000 inhabitants. A friend told me that he once suffered
so much from the heat there in June, that he determined never to go to
the Pyrenees again. We were there the second week in June, and we
suffered more from rain and cold, and were very glad of a fire in the
evening.
Except to the south, in the direction of the Porte de Venasque, one of
the chief mule passes into Spain during summer, where there are fine
snow-capped mountains, the scenery from the town is not grand, but it
is within easy reach of the wildest parts of the Pyrenees.
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