It has been discovered tliat the average...

It has been discovered tliat the average length of time that the $12,000 a year clergvman is able to work without becoming a physical wreek and haviug to be sent abroad is seven montlis. The $10,000 man can stand it eigh months; he who receives 7,000, nine montlis; the $5,000 preacherten months -and so on; but the man on a $600 salary works right along all the year round and don't break down. Who can explain this?