Fig. 1.--Residue of larva three days dead of _bacillus alvei_; _b_, bacilli. Spores and degenerated trachæ cover the field. Fig. 2.--Healthy juices of bee larva. Fig. 3.--Juices of larva (living) with disease in acute stage; _a a_, leptothrix forms. Fig. 4.--Brood cells from a diseased colony; _a a_, cells containing healthy forms. Fig. 5.--Cultivation in sterilized agar-agar showing the colony form of bacillus. Fig. 6.--Same cultivation twenty-four hours later. Fig. 7.--Spore changing into bacilli. Fig. 8.--Bacillus passing into spore condition. All of these symptoms may, however, be present when no foul brood exists; but if, upon opening some of the cells whose caps are sunken or slightly punctured, a brown, ropy, putrid mass is found, which, when lifted on the end of a sliver of wood, glides back into the cell or strings down from the mass like thick sirup, it is pretty certain that foul brood is present. Caution is necessary or it maybe spread all through the apiary. The hands, as well as all tools used about the infected colony, should be cleansed by washing in a solution of corrosive sublimate (one-eighth ounce dissolved in 1 gallon water) before going to another hive. If but few are found diseased they should be burned at once--at night, when all the bees are at home. If all or nearly all are affected, or if the disease does not seem virulent and other apiaries in the neighborhood are not endangered thereby, a cure may be attempted. Removal of all of the combs and confinement of the bees in an empty box, obliging them to fast until some drop from hunger, followed after releasing them by liberal feeding, will frequently effect a cure, as indicated many years since by Mr. M. Quinby. The hives may be disinfected by washing in carbolic-acid water and used again. A second removal of the bees and fasting may be necessary in some cases. It will also be well to feed medicated sirup--1 part of carbolic acid, or phenol, to 600 or 700 parts of sirup. Many omit the fasting, but destroy all combs and frames and supply comb-foundation starters, removing four days later all combs built and giving a second lot of starters. It is well to supplement this treatment with feeding of medicated sirup. Phenol having been suggested to Professor Cheshire as a remedy, he experimented until he found that if a sirup containing 1 part of phenol to 400 or 500 parts of the food be poured in the cells adjacent to the brood, and the diseased brood, after brushing off the bees, sprayed with a solution of 1 phenol to 50 water, a cure was speedily effected. The great risk of spreading the disease, as well as the time and expense which a cure by drugs by the fasting process involves, will cause immediate destruction to be resorted to as the cheapest in the end if taken in time.