in agriculture, an application that accounts for approximately 40% of the total production of these agents. It is obviously impossible to give detailed descriptions of the many excellent papers in this volume, but some points may be noted. From a pharmacological viewpoint, the area of structure-activity relationships is particularly well covered in regard to penicillins (K. et al.) and lincomyc...

Exposure to picryl guinea pig albumin with 3-6 picryl groups per mole failed to affect the ability of peritoneal exudate or peripheral blood leukocytes from sensitized donors to transfer delayed sensitivity to normal recipients. In contrast, conjugates containing 40-48 picryl groups per mole altered the ability of exposed leukocytes to transfer delayed sensitivity. Evidence is presented that hi...