This section is from the book "The Gardener V3", by William Thomson. Also available from Amazon: The New Organic Grower: A Master's Manual of Tools and Techniques for the Home and Market Gardener.
What Imperial Blue is among Ageratums this is among Heliotropes. A lively purplish blue. Grows about 9 inches high, and having a first-rate habit. In some localities, where for the last few years purple Verbenas have, owing to the drought, not been satisfactory, it has been decided to substitute this Heliotrope, the effect produced being similar. This may apply most to dry soils.
1, Sedum rhodiola; 2, Diptolaxis tenuifolia variegata; 3, Fritillaria nigra; 4, Pulmonaria officinalis; 5, Spiraea filipendula; 6, Viburnun prunifolia. We cannot always, and should not be asked to, name plants of which leaves only are sent to us, as in the case of the second and fifth of the above.
Your boiler will heat all the pipe you propose to attach to it for ordinary purposes. For early forcing it would have to be fired vigorously.
At the commencement of my last paper, I incidentally remarked that in all probability we should not have sown a seed in the open before the beginning of March. That time is passed, no seeds are sown, and probably will not be for some time to come, severe frosts, snow, and rain being in the ascendant. As a consequence, still more Peas, Lettuces, Sprouts, and Cauliflowers are being grown in boxes and frames, to be transplanted as weather permits.
In my concluding paper I propose treating briefly upon a few other fruits, more especially with regard to the adaptability of different species or varieties for the various sites. To attempt anything beyond this, seeing how ably "A. H. H." is handling the subject generally, would be altogether a waste of time and space.
Take the bulbs from the glasses, thoroughly cleanse both the roots and the interior of the glasses with pure water, and then place a few small pieces of charcoal in each glass, and fill them with fresh soft water, and replace the bulbs. Examine them every other day to ascertain if the water has become tainted, and if so, cleanse and change again - if not so, let well alone.
Your tree may be a hybrid between the Lime and the Elm, as you suppose. We will consult some botanical authority in the matter, and give you the opinion expressed regarding your tree.
We do not think the plan you speak of would stamp out the Potato-disease. The spores would still be here, we fear for a much longer time - a few years.
 
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