Many requests come to the Animal Husbandry Department of Iowa State College for information relating to the literature of the swine industry as well as for the names and addresses of swine registry and record associations. To supply this increasing demand this catalog and directory has been prepared to present information which is concise and up-to-date. The literature on swine husbandry is growing rapidly and many notable additions to the list of publications on this subject may be expected in the near future.

The brood sows represent in a large measure the backbone or the swine herd, hence their correct nutrition and handling are of dollars and cents Importance.

When a practical feeder, trained In the school of experience, asks, "What are vitamines, anyway?" and "What do these rat-feeding experiments have to do with feeding pigs?" he deserves a fair answer. While the study of vitamines In the experiment stations has uncovered facts of much value to the livestock man, It Is possible for those who are over-enthusiastic to emphasize too highly In some cases the Importance of vitamines to animals red under average conditions. It Is essential to discover where emphasis should be laid upon vitamines under practical feeding conditions.

Forage crops are essential in good and economical summer rations for growing and fattening swine. They provide a way to cut down the cost of gains, inasmuch as they cut down on the requirement of meat meal tankage and other desirable protein supplements which are usually high in price. At the same time they enlarge opportunities for the quicker, more profitable raising of better and healthier pigs.

Countless hundreds of orphan pigs are lost annually in Iowa and other states of the corn belt. When they are saved and reared, it is mostly thru "b'guess and b'gosh" methods, there being usually very little system on the majority of farms in making an attempt to pull them thru. The present loss of orphan pigs can be greatly reduced by following certain feeding and management essentials which are now known.

The results of pig feeding tests, conducted in 1920–21 with specialty or commercial feeds by the Animal Husbandry Section of the Iowa Agricultural Experiment Station, have been so grossly and persistently misrepresented by one company in particular that this circular Is Is· sued to present the complete figures. The misrepresentation con· slated In using only a part of the experimental figures, thus giving an Incorrect interpretation of the data secured in the test.

Hundreds of requests come to the Animal Husbandry Department of Iowa State College for information relating to the literature of the swine industry as well as for the names and addresses of swine registry and record associations. To supply this increasing demand this catalog and directory has been prepared to present Information which is concise and up-to-date. The literature on swine husbandry is growing rapidly and many notable additions to the list of publications on this subject may be expected in the near future.