 Frequency of Sub-Standard Vision. The percentage of employees with sub-normal vision has been determined in several carefully recorded series of investigations. For example, JW Schereschewsky found that in a total of 2,906 garment workers only 743...  Transactions - 55. lappuseautors: National Safety Council - 1921Pilnskats - Par šo grāmatu
 | John Michels (Journalist) - 1922 - 700 lapas
...production. Substandard vision was found to be of great frequency. One investigation showed that out of 2,906 garment workers only 743 or a little over...of workers who made the greatest use of their eyes. An examination of more than 10,000 employees in factories and commercial houses found 53 per cent,... | |
 | American Engineering Council - 1921 - 432 lapas
...been determined in several carefully recorded series of investigations. For example, JW Schereschewsky found that in a total of 2,906 garment workers, only 743, or a little over 25% had bilateral normal vision; 17% having normal vision in one eye, with the other defective.5 The highest... | |
 | John Michels (Journalist) - 1922 - 690 lapas
...production. Substandard vision was found to be of great frequency. One investigation showed that out of 2,906 garment workers only 743 or a little over...of workers who made the greatest use of their eyes. An examination of more than 10,000 employees in factories and commercial houses found 53 per cent.... | |
 | Eugene Lyman Fisk, American Engineering Council - 1923 - 556 lapas
...been determined in several carefully recorded series of investigations. For example, JW Schereschewsky found that in a total of 2,906 garment workers only...cent. having normal vision in one eye, with the other defective.804 The highest percentage of defective vision was in the class of workers who made the greatest... | |
 | Eugene Lyman Fisk, American Engineering Council - 1923 - 554 lapas
...been determined in several carefully recorded series of investigations. For example, JW Schereschewsky found that in a total of 2,906 garment workers only...little over 25 per cent. had bilateral normal vision ; 1 7 per cent. having normal vision in one eye, with the other defective.804 The highest percentage... | |
 | Eye Sight Conservation Council of America - 1922 - 36 lapas
...been determined in several carefully recorded series of investigations. For example, JW Schereschewsky found that in a total of 2,906 garment workers, only 743, or a little over 25% had bilateral normal vision; 17% having normal vision in one eye, with the other defective.5 The highest... | |
 | 1922 - 486 lapas
...frequency of subnormal vision has been determined in several series of investigations. Dr. Schereschewsky found that, in a total of 2,906 garment workers, only...cent having normal vision in one eye with the other detective. The highest percentage of defective vision was in the workers who made the greatest use... | |
 | William Henry Leffingwell - 1926 - 890 lapas
...Committee on Waste in Industry will show the extent of subnormal vision in this country: JW Schereschewsky found that in a total of 2,906 garment workers, only 743, or a little over 25%, had bilateral normal vision; 17% having normal vision in one eye, with the other defective. The highest... | |
 | Illuminating Engineering Society - 1922 - 882 lapas
...is produced. Subnormal vision was found to be of great frequency. One investigation showed that out of 2,906 garment workers only 743 or a little over 25 per cent had normal vision in both eyes, 17 per cent having normal vision in one eye with the other eye defective.... | |
| |
