NATURAL HISTORY NOTES 
149 
Surely “ poikilothermal ” is out of place, even in a note, in such a publication, 
and so is the Doctrine of Signatures, even if carbon-dioxide and evaporation are 
admissible. We should have preferred more recognition of the heuristic 
principle. 
The Cinematograph in Science, Education, and Matters of State. By Charles 
Urban. I’p. 56. 
Considerations of expense will probably long prevent the general introduction 
of the cinematograph into class teaching, or the preparation by the ordinary 
teacher of his own tilms, but this pamphlet, though doubtless in great measure 
a trade circular, demonstrates how much has been already done to make this 
instrument of real scientific use in biology and medicine. 
The Young Citizen for March. Edward Lloyd, Limited. Price id. 
As we were walking along Fleet Street a short time ago we were filled with 
momentary indignation at the sight of several glazed cases in a window each 
containing two dozen butterflies, including the Scarce Swallow-tail, the Camber- 
well Beauty and the White Admiral. These cases were to be given away in 
exchange for coupons cut from The Young Citizen. For the moment we doubted 
whether even the wholesale slaughter of continental specimens could supply such 
gems at such a rate, for the case was advertised at half-a-crown ; but we rubbed 
our spectacles and found with much satisfaction that we had been taken in. The 
butterflies aie admirably printed in colour and life-size on cardboard, cut out and 
mounted, and here in the The Young Citizen each species is briefly described. 
Such a collection forms an excellent present for a young Selbornian . — Board of 
Agriculture Leaflets. 
Among the leaflets recently issued by the Board of .\griculture and Fisheries 
which are likely to interest our readers are — No. 169 on The Cultivation of Man- 
golds, No. 170 on The Uses of Lime, No. 184 on Red, White and Alsike 
Clovers, No. 186 on The Large Larch Sawfly, and No. 195 on The American 
(Jooseberry Mildew. Any of these may be obtained gratis and post free from 
the Board, 4, Whitehall Place. 
Received. — The summer number of Bird Notes and News ; The American 
Botanist for May ; The Victorian Naturalist and Bird-Lore for May and June; 
The LLumanitarian for June ; and The Naturalist, The Lrish Naturalist, The 
Animal World, The Animals' Friend, The Agricultural Economist and The 
Estate Magazine for June and July. 
NATURAL HISTORY NOTES. 
506 . At Liberty in the Zoo. — No cage, no label, and unfettered freedom! 
•Such are the privileges enjoyed by two little grey squirrels in the gardens of the 
Zoological Society at Regent’s Park. All day long the visitors who come and 
go are amused at the playful antics of these furry creatures, and by their friendly 
attitude to all, they have created numerous admirers. No matter what food is 
offered them it is readily taken from the giver’s hand with but little show of 
timidity, and then, off they scamper to some distance away to eat it. A thing 
that interests many people is to see them bury the nuts, and this they do in all 
places. There may be some who wonder at the contrast presented by the uncon- 
trolled freedom of the squirrels and the captivity of their brethren ; but there are 
species of the animal kingdom in the Zoo which, on being given their liberty, 
would create wholesale panic and destruction. 
37, Alwyne Villas, Canonbury, N. Chas. E. J. Hannett. 
507 . Do Dogs Eat Carrion ?— In reply to the query on this subject I 
may say that last summer a sheep died in the pasture close under our garden 
wall. Being the height of the hay season the men were too busy to bury it, and 
in view of the intense heat we feared a nuisance. The sheep dogs, however. 
