How would you explain this sentence?
Baptisms of Males exceed Females by one-tenth, or one in ten.
Burials of Females exceed Males by one m thirty.
It appears that a child, born Ed bred m this parish, has Em equal chance to live above forty years.
Twins thirteen times, many of whom dying young have lessened the chance for life.
Chances for life in men and women appear to be equal.
How would you explain “Twins thirteen times” in the second to last sentence?
PS: this extract is taken from The Natural History of Selborne.