This section is from the book "The Gardener's Monthly And Horticulturist V23", by Thomas Meehan. See also: Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long.
In reply to the query of your correspondent, R. L. B., of Des Moines, Iowa, I am glad to be able to give him a receipt for a better method than lime wash, which is not only very unsightly, but for most plants gives too much shade. We use now altogether naphtha mixed with a little white lead, just enough to give it the color and consistency of skim milk. This is applied with a syringe outside the glass, costing only about twenty-five cents to every one thousand square feet. One coat giving something the appearance of ground glass, which breaks the glare of the sun quite enough for most plants. In houses where such plants as ferns, dracenas, caladiums, palms, etc, are grown we give two coats. This shading sometimes requires to be Jenewed once about midsummer, but it is done so quickly and cheaply that that is of little consequence. The first sharp frost in fall loosens it so that it is easily rubbed off. We have tried many kinds of shading for glass, but have found nothing so cheap and satisfactory as this.