SURGEON-GENERALS OFFICE, Richmond, Va., April 1, 1863. Medical directors will direct medical officers to make persevering and well-regulated efforts to have collected for the nse of the sick in the field affected or threatened with scurvy daily supplies of the within-enumerated or other native edible plamits and herbs growing in the vicinity of camp, viz: Wild mustard, water cresses, wild gar- lic or onion, sassafras, lambs-quarters, sorrel, shoots of the pokeweed (bleached preferred), artichoke, plume of the dandelion (bleached), garden parsley, peppergrass, wild yam. Company commanders should also be urged for the prevention of scurvy to procure in like manner by detail from their comnpanies supplies of the same for the use of their companies. Those charged with collecting should be impressed with the vital importance of exercising a careful discretion in the recognition of the different articles to be collected. As an additional security in doubtful cases, inspection by a umedical officer is recommended. lIe should also give instructions concerning the methods of preparing and using each amticle as best calculated to secure good effect. Medical officers in charge of hospitals will be instructed to furnish the sick with as liberal an allowance of succu- lent vegetables as their condition and the state of the hospital fund will allow. SAMUEL PRESTON MOORE, Surgeon- General.