With the help of biochemist James Chappell, we have used synthetic biology to design and create a bacteria that can modify the metabolism of pigeons. To achieve this, we have created a new biobrick, or standard biological part, that when added to the genetic information of the bacteria, creates lipase. We have also used a biobrick that lowers the ph. The result is a biological device that produces a kind of window-soap. We have built this device in the bacteria Lactobacillus, which is a bacteria that naturally occurs in the digestive tract. So when feeding this bacteria to a pigeon, it should produce and defecate biological soap.

At the Farm and Trade School on Thompson's Island, where the boy pupils are taught to kill rats, as all boys should be, there is a henhouse built with a cement foundation, but it has an earth floor and no foundation wall on the south side; therefore it is not rat-proof. The wooden floor of the main house is raised about three feet above the earth, leaving a space below it for a shelter for geese. Here the rats have burrowed in the earth, and as it was considered unsafe to use carbon bisulphide there on account of the fire danger, water was suggested. Two lines of common garden hose were attached to a near-by hydrant, the ends inserted into rat holes and the water turned on. All rat holes leading from the henpens to the outer world were closed with earth, and several boys were provided with sticks, to the end of each of which a piece of hose two feet long had been attached. A fox terrier was introduced into the henpens, and in about half an hour the rat war began. As the half-drowned rats came out of their holes somewhat dazed they were struck by side swings of the hose sticks, which knocked them off their feet, to be killed by other blows. If one escaped into the henpens, boy or dog killed it. This operation was repeated later from time to time. Four successive battles several weeks apart yielded 152 rats from under and about this henhouse, and no doubt many young rats were drowned in their nests. Where no high-pressure water main is available burrows on the banks of pond, river or ocean might be cleared in this way by means of a powerful sewer pump and hose.

It has long been the boast of the Chicago packing houses, that in killing hogs everything is utilized — except the squeal. The squeal has now been turned to account in this way:

An ingenious piano salesman travels through the country, taking several instruments with him. To draw a crowd he gives a free evening entertainment with a moving picture machine. Between each series of views he demonstrates on the pianos. One of his pictures shows the progress of events at a packing house. To make the scenes in the killing room realistic he visited the plant and secured some phonograph records of the porkers as they let out some vigorous remarks. Now when the moving picture reaches the pig sticking act, he turns on his phonograph and his visitors can see and hear just as if they were actually present at the original scene of operations.