234. THE PRESSING. Bonnets and hats are pressed after they are made. I am told that a proper press costs pretty nearly a hundred pounds; but, then, that it will do prodigious deal of business. I would recommend to our friends in the country to teach as many children as they can to make the plat. The plat will be knitted in London, and in other considerable towns, by persons to whom it will be sold. It appears to me, at least, that this will be the course that the thing will take. However, we must leave this to time; and here I conclude my observations upon a subject which is deeply interesting to myself, and which the public in general deem to be of great importance. 235. POSTSCRIPT on _brewing_.--I think it right to say here, that, ever since I published the instructions for brewing by copper and by wooden utensils, the beer at _my own house_ has always been brewed precisely agreeable to the instructions contained in this book; and I have to add, that I never have had such good beer in my house in all my lifetime, as since I have followed that mode of brewing. My table-beer, as well as my ale, is always as clear as wine. I have had hundreds and hundreds of quarters of malt brewed into beer in my house. My people could always make it strong enough and sweet enough; but never, except by accident, could they make it CLEAR. Now I never have any that is not clear. And yet my utensils are all very small; and my brewers are sometimes one labouring man, and sometimes another. A man wants showing how to brew the first time. I should suppose that we use, in my house, about seven hundred gallons of beer every year, taking both sorts together; and I can positively assert, that there has not been one drop of bad beer, and indeed none which has not been most excellent, in my house, during the last two years, I think it is, since I began using the utensils, and in the manner named in this book. ICE-HOUSES. 236. First begging the reader to read again paragraph 149, I proceed here, in compliance with numerous requests to that effect, to describe, as clearly as I can, the manner of constructing the sort of Ice-houses therein mentioned. In England, these receptacles of frozen water are, generally, _under ground_, and always, if possible, under the _shade of trees_, the opinion being, that the _main_ thing, if not the _only_ thing, is to keep away _the heat_. The heat is to be kept away certainly; but _moisture_ is the great enemy of _Ice_; and how is this to be kept away either _under ground_, or under the shade of trees? Abundant experience has proved, that no thickness of _wall_, that no cement of any kind, will effectually resist _moisture_. Drops will, at times, be seen hanging on the under side of an arch of any thickness, and made of any materials, if it have earth over it, and even when it has the floor of a house over it; and wherever the moisture enters, the ice will quickly melt.