 | 1904 - 644 strani
...chemical rays than sunlight, as the atmosphere absorbs a large percentage of these rays. The light is so intense it is impossible to look at it with...necessary for all the attendants and patients to wear dense smoked glasses while the lamp is in operation; an aluminum hood about two feet wide surrounds... | |
 | 1904 - 632 strani
...to look at it with the naked eye ; it is necessary for all the attendants and patients to wear dense smoked glasses while the lamp is in operation ; an...which hood is fringed on its lower border with a deep crimson colored paper skirt to further aid in excluding the diffused light from the patients. The concentrated... | |
 | 1904 - 590 strani
...look at it with the naked eye, and it is necessary for all the attendants and patients to wear dense smoked glasses while the lamp is in operation ; an...which hood is fringed on its lower border with a deep crimson -colored paper skirt to further aid in excluding the diffused light from the patients. The... | |
 | 1904 - 810 strani
...chemical rays than sunlight, as the atmosphere absorbs a large percentage of these rays. The light is so intense it is impossible to look at it with...necessary for all the attendants and patients to wear dense smoked glasses while the lamp is in operation. An aluminum hood about two feet wide surrounds... | |
 | Frederick Converse Beach, George Edwin Rines - 1912 - 864 strani
...fort}' times stronger than an ordinary arc street lamp, and uses from 60 to So amperes of current of no voltage. This lamp burns a specially made carbon....lamp is in operation. An. aluminum hood about two feet wide surrounds the lamp, which hood is fringed on its lower border with a deep crimson-colored... | |
 | 1904 - 624 strani
...chemical rays than sunlight, as the atmosphere absorbs a large per centage of these rays. The light is so intense it is impossible to look at it with...necessary for all the attendants and patients to wear dense smoked glasses while the lamp is in operation ; an aluminum hood about two feet wide surrounds... | |
 | 1903 - 576 strani
...chemical rays than sunlight, as the atmosphere absorbs a large percentage of these rays. The light is so intense it is impossible to look at it with...necessary for all the attendants and patients to wear dense smoked glasses while the lamp is in operation. An aluminum hood about two feet wide surrounds... | |
 | 1904 - 448 strani
...atmosphere absorbs a large percentage of these rays. The light is so intense it is impossible to look at t with the naked eye and it is necessary for all the attendants and patients to wear dense smoked glasses while the lamp is in operation; an aluminum hood about two feet wide surrounds... | |
 | 1904 - 586 strani
...chemical rays than sunlight, as the atmosphere absorbs a large percentage of these rays. The light is so intense it is impossible to look at it with...patients to wear smoked glasses while the lamp is in opeation ; an aluminum hood about two feet wide surrounds the lamp, which hood is fringed on its lower... | |
 | Ferdinand Eugene Daniel - 1903 - 614 strani
...chemical rays than sunlight, as the atmosphere absorbs a large percentage of these rays. The light is so intense it is impossible to look at it with...necessary for all the attendants and patients to wear dense smoked glasses while the lamp is in operation. An aluminum hood about two feet wide surrounds... | |
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Finsen lamp produces a much greater number of chemical rays than sunlight, as the atmosphere absorbs a large percentage of these rays. The light is so intense it is impossible to look at it with the naked eye, and it is necessary for all the attendants... 
