1951-09-22 — Page 4

^

Page: 4

THE CHINA-MAIL, SATURDAY, SEPTEMBER 22, 1951.

RAIN-MEN AT WORK

Dr. W. E. Howell voirs which supply of gallone daily are cause so litle rain

last year.

+

MANY Now Yorkers see

a certain amount of similarity these days be- tween their home city and Coleridge's Ancient Mariner, who found "water, water, everywhere, but not I drop to drink." For, while water practically Aurrounds their metro- polls, it can't be used for drinking, bathing and other purposes because of its salt and sewage con- tent. Meanwhile, reger- New York with millions far below capacity be fell in the watershed in the

In the hope that science could cope with the pro- lem, ity ofclats rated in Dr Wallace E. Howell, Harvard melcorctogist, to try a series of rainmaking experiments. Following investigation, he said that charsces of lucicasing rainfall over the watershed were "goed enough to justify. a sustained attempt." He will employ one or more of three methods developed recently by Dr Irving Langmuir and Br Bernard Vonnegut, General Electric selentisis, with the Army Signal Corps and the 'Omec of Naval Research.

The programme, called Project Cirrus, produced torrential rainfall over huit of New Mexico. More than 320 bilion gallons of rain fall.

When Atmospheric "Seeding" Brought Record Rainfall

WHEN THIS CLOUD appeared over New, Mexico, scientists began seeding with silver lodide. A few hours after, it developed an area of rain about one mile square.

¡LESS THAN one-half hour later, the cloud had more than doubled in size and rain- began to fally In general, the gray areas in low parts of the cloud are falling rain.

covers a mountain range in

A racetrack in the clouds formed by seeding a stratus cloud with.dry ice. This causes water droplets to turn Inio,snow or ice crystals, which fall from cloud..

WITH A CHOPPER and a shovel, two New York City patrolmen go to work on plece of dry ice before. police plane took off to seed clouds ever watershed,

CREATING SNOWSTORM in home freezer,, Vincent Shaefer producasia cold;:: cloud by blowing. Dry ice dropped on it brings snow. Dr. Langmuic looks on.......