The lime should be placed in a barrel and enough water poured on it to start it slaking and to keep the sulphur off the bottom of the barrel. The sulphur, which should first be worked through a sieve to break up the lumps, may then be added, and, finally, enough water to slake the lime into a paste. Considerable stirring is necessary to prevent caking on the bottom. After the violent boiling which accompanies the slaking of the lime is over, the mixture should be diluted ready for use, or at least enough cold water added to stop the cooking. From five to fifteen minutes are required for the process. If the hot mass is permitted to stand undiluted as a thick paste, a liquid is produced that is injurious to peach foliage and, in some cases, to apple foliage. The mixture should be strained through a sieve of twenty meshes to the inch in order to remove the coarse particles of lime, but all the sulphur should be worked through the strainer. GLOSSARY To enable young readers to understand the technical words necessarily used in the text only popular definitions are given. =Abdomen=: the part of an insect lying behind the thorax. =Acid=: a chemical name given to many sour substances. Vinegar and lemon juice owe their sour taste to the acid in them. =Adult=: a person, animal, or plant grown to full size and strength. =Ammonia= (_ammonium_): a compound of nitrogen readily usable as a plant food. It is one of the products of decay. =Annual=: a plant that bears seed during the first year of its existence and then dies. =Anther=: the part of a stamen that bears the pollen. =Atmospheric nitrogen=: nitrogen in the air. Great quantities of this valuable plant food are in the air; but, strange to say, most plants cannot use it directly from the air, but must take it in other forms, as nitrates, etc. The legumes are an exception, as they can use atmospheric nitrogen. =Available plant food=: food in such condition that plants can use it. =Bacteria=: a name applied to a number of kinds of very small living beings, some beneficial, some harmful, some disease-producing. They average about one twenty-thousandth of an inch in length. =Balanced ration=: a ration made up of the proper amounts of carbohydrates, fats, and protein, as explained in text. Such a ration avoids all waste of food. =Biennial=: a plant that produces seed during the second year of its existence and then dies. =Blight=: a diseased condition in plants in which the whole or a part of a plant withers or dries up. =Bluestone=: a chemical; copper sulphate. It is used to kill fungi, etc. =Bordeaux Mixture=: a mixture invented in Bordeaux, France, to destroy disease-producing fungi. =Bud= (noun): an undeveloped branch. =Bud= (verb): to insert a bud from the scion upon the stock to insure better fruit.