Word: one-fourth
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...lead poisoning," and his still incomplete work on exhumed bones tends to confirm his theory. Using tombstone inscriptions as a guide, he reports that life expectancy among the upper classes was 22-25 years; literary and census data indicate that the number of aristocratic births was remarkably low, "perhaps one-fourth of what would have been necessary to maintain their number." Over a period of generations, "this aristothanasia" wiped out the leaders of thought and culture...
...offices have impressive combination locks, but the institute's annual reports outline the scope of the work in general terms, and such code names for specific projects as "Summit" and "Spicerack" are commonly heard on campus. The university has also been candid about the fact that roughly one-fourth of its annual $100 million in operating funds comes from research contracts and grants, although it says that only 19 out of nearly 900 specific projects include limitations on publishing the findings, and only twelve of these are military...
...record of Catholic-school students is especially impressive when measured against evidence that the quality of teaching they receive is erratic and classroom conditions less than ideal. About 47% of the sisters teaching in high schools have a master's degree; but only one-fourth of the fast-growing body of laywomen teachers in elementary schools have had more than one year of college work. Thanks to the generally low pay scale of Catholic education-laywomen in elementary schools average $3,250 a year-and to lay teachers' widespread conviction that they are treated as second-class citizens...
...defective gene was only one of tens of thousands in each sex cell (sperm or ovum); it was recessive, meaning that whenever it was paired with a normal gene, its maleficent action was blocked. Even so, it spread so far and wide that it eventually appeared among Ashkenazic families that did not know they were related. Then a husband and wife, each bearing the gene, began to have dysautonomic children. On the average, one-fourth of the offspring of such marriages will have two normal genes (see diagram); two will be healthy but carry one abnormal gene, while the fourth...
...About one-fourth of all dysautonomic children die by age ten, Dr. McKusick reports. After that the death rate mounts steadily; the oldest patient on record is 36. The usual cause of death is the very problem that the infant encounters at first feeding: inhalation of food into the lungs, causing pneumonia, often coupled with heart failure. So far, the best palliative treatment for dysautonomia consists of using tranquilizers to help control the intense vomiting that characterizes the disorder. There is no cure...