This section is from the book "The Gardener's Monthly And Horticulturist V24", by Thomas Meehan. See also: Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long.
A few weeks before the April number of the Gardener's Monthly arrived with Mr. Greer's short note on glazing, having occasion to put up some sash for a temporary purpose, and not wanting to wait for bedding the glass in putty, I concluded to tack them in loosely, end to end, just as Mr. Greer did, only not putting any candle-wick or anything else under the glass, and using the largest sized zinc points. One of these holds down the two corners where two panes meet. After a drenching rain of forty-eight hours, I found these the tightest of the whole range of sash, not a drop coming through anywhere. I am so well pleased with the plan, that I propose taking out my loose glass (made so by bad putty) this coming summer, and put them in after the same manner. I can thus avoid overlapping, and get rid of unsightly strips of dirt wherever an overlap occurs, and save leaks from good-for-nothing putty. In these villainous days of frauds and adulterations, it is impossible to get any pure materials for making putty, and the miserable compound soon cracks and leaves the roof full of holes, and the glass gets loose and and flies off with every high wind.
I believe narrow strips of rubber on the shoulder of the rabbet and under the glass would make it perfectly tight, and I know the water will not run in where the panes of glass come together at the ends. The elasticity of the rubber would press the glass up tightly against the points or tacks, and thus keep all close, even when hot weather shrinks and dries the sash and so much glass gets loose.
I wish some one would explain to me the philosophy, sense or reason of our being told to set our line of pipes so that there shall be a rise of a foot or eight inches from the boiler to the expansion tank, one-third or one-fourth of the length, and then a gradual decline to the boiler. I always had an idea that water would run best down hill, and think so yet, but here it has to run up hill part of the way. I am of the opinion that the best place for the expansion tank, and consequently highest point, would be close to the boiler; there it would be all down hill work. I am confirmed in this belief by seeing the arrangement of pipes in the Chicago Floral Co.'s houses, where the flow expands into a large tank, high over the boiler, and is carried overhead through the potting and packing sheds, and distributed through the various houses, all on the downward flow. I was astonished at the number of houses thus heated by one boiler. I, therefore, have an idea to put my expansion tank immediately over the boiler, raise my line of pipes so as to gradually return from that point to the lowest; also to heat a propagating tank from the overflow of the expansion when the water gets warm.
I am waiting to be enlightened.