*234 
QUERIES, ANSWERS, ETC. 
Naturalists’ Calendar. —As an admirer of the Horticultural Register , I 
beg leave to suggest to you, that it would he a great improvement to the “ Natu¬ 
ralists’ Calendar,” if you could give several plates, monthly, of the principal Bri¬ 
tish Insects, especially of the Coleoptera and Lepidoptera in addition to stating 
where and when they maj r be found, and I think they might be grouped together 
in the same manner as the British Plants and Shells. You would thus in time 
render the Register a real Magazine of Natural History, and make it invaluable 
to young naturalists and gardeners, who cannot afford to pay for works which 
would give the desired information. J. D. 
Answer. —We have for some time had several improvements in contempla¬ 
tion, including the one our correspondent names. If the sale continues to in¬ 
crease, as it has done latterly, we cannot say what our subscribers will render us 
capable of doing : ’tis very probable, this, as well as other important additions, 
will be regularly carried into effect. Conductor. 
Remedy for Pines injured by bottom heat. —Having had the ill luck to 
burn a pit of very fine established pines, by too strong a bottom heat, I should 
feel much obliged by your advice. Will they, if kept in a brisk moist heat, root 
afresh and start? Or must they be thrown away? A Constant Reader. 
Answer. —We would not advise to throw them away, by any means. The 
best plan that can be adopted is to repot them without delay, shaking all the old 
burnt soil from the roots, then with a sharp knife take away all that are injured, 
and when potted subject the plants to a brisk, but not violent moist heat, and if 
they are not very much injured, they will soon start vigorously.— Con. 
Changing the Colour of the Flowers of the Hydrangea hortensis.—Last 
spriug, being desirous of having the flowers of the Hydrangea hortensis of a blue 
colour, I took great pains in forming the compost of two pots, in which I planted 
the Hydrangea, in strict conformity to the directions contained in the communi¬ 
cation of your intelligent correspondent “ Rusticus,” at pages 11 and 12 of the 
Horticultural Register; these plants flowered luxuriantly in due season, but of 
the original or natural colour. M. 
Talc. —Your subscriber, page 427, can procure Talc at Messrs. Matthews and 
Son, 9, Crooked-Lane, London; whether it will answer the purpose, I cannot say. 
Changing the Colour of Hydrangeas. —You will oblige many persons, 
and improve the beauty of our gardens, if you would give directions how to pro¬ 
cure blue Hydrangeas; many are the prescriptions given, but they all seem cal¬ 
culated to mislead rather than instruct. 
Answer. —We are trying some experiments, which, we think, will be conclu¬ 
sive and satisfactory, and we hope will set the matter at rest. Conductor. 
Mode of erecting a Vinery, Pinery, &c.— I wish to make a small Vinery, 
Pinery, Melon bed, and a small bed for raising tender seeds and plants, for 
planting out; I want them all in one line joining each other, and the whole 
length of all not to exceed 30 to 36 feet. The vinery may be in the centre, the 
pine and melon beds at one end, the hotbed, for ordinary purposes, at the other. 
There is to be no fire, the heat must proceed entirely from manure, to assist the 
heat of the bark for the pinery; and disposed in the best manner for the grapes 
and melons. Now I want to know the best way of managing this; what should 
be the mode of constructing such a building ? the whole, grapery and all to be 
kept as low as possible. In page 10 of the present volume, a mode of construct¬ 
ing a pinery without the use of fire is described. 1 have read it over attentively, 
