Can anyone please explain to me the meaning of this quote?
A wife is essential to great longevity; she is the receptacle of half a man's cares, and two-thirds of his ill-humor. -Charles Reade
This means that having a good wife allows you to live longer. That's because a husband can give half of his worries to his wife ("she is the receptacle of half a man's cares"), and will take out his bad moods on her ("and two-thirds of his ill humor"). She presumably puts up with this.
Pity the wife, though.