Princeton became the second of the Big Three to increase minimum faculty pay Tuesday when it boosted all minimum by $500. Yale announced a similar increase three weeks ago.

Tiger instructors will now get $3,500, assistant professors $4,500, associate professors $5,500, and full professors $7,500. Both Yale and Princeton took funds for the raises from recent tuition increases The schools gave the faculty preference in allotment of the funds because of the rise in the cost of living.

Yale appropriated $25,000 to salary increases, fixing $3,500 as the minimum earning. Previously, President A. Whitney Griswold of Yale had termed low faculty pay and the high cost of living the "cause of extreme emergency in the lowest grades of the faculty."

Local salaries are still better than either of the two schools. A full professor here gets a minimum of $10,000, campared to $8,500 at Yale, and Princeton's $7,500.

In discussing the fact that his school's salaries were the lowest of the Big Three, Ricardo A. Mestres, assistant treasurer of Princeton, stated that "cost of living was lower in a country town."

Meanwhile Columbia announced a tuition boost of $150, which brings next year's college cost to $750. Part of the increased funds are earmarked for payrolls; the New York school plans to establish a minimum annual wage of $3,600 for full-time instructors, and to raise salaries all the way up the line.