J'ignore si cette pratique obtient du succes."), I never heard of anything of the kind in England.

I was led, as I believe, to think of the experiment from having read in Wrangel's "Travels in Siberia" (297/3.

Admiral Ferdinand Petrovich von Wrangell, "Le Nord de la Siberie, Voyage parmi les Peuplades de la Russie asiatique, etc." Paris, 1843.) of the wonderful power which the Samoyedes possess of keeping their direction in a fog whilst travelling in a tortuous line through broken ice.

With respect to cats, I have seen an account that in Belgium there is a society which gives prizes to the cat which can soonest find its way home, and for this purpose they are carried to distant parts of the city.
Here would be a capital opportunity for trying rotation.
I am extremely glad to hear that your book will probably be translated into English.
P.S .-- I shall be much pleased to hear the result of your experiments.
LETTER 298.

TO J.H.FABRE.