What are the chances of you falling over and hitting something solid? Most homes today have hardwood floors or tiles so statistically the chances are really high. The problem is this kind of fall is very common in even the safest homes and gardens. The damage to a falling toddler's hands and knees can be an acceptable form of pain for learning but a head injury can be traumatic for both infant and parent. Thudguard® goes one step further and takes the protection straight to the infants head giving you great peace of mind.
"Rem" is an abbreviation for "roentgen equivalent (in) man." The rem takes into account the biological effects of different kinds of radiation. For external gamma-ray radiation from fallout, the numerical value of an exposure or dose given in roentgens is approximately the same as the numerical value given in rems or in rads. The rad is the unit of radiation energy absorption in any material and applies to all kinds of nuclear radiations. Therefore, for simplicity's sake, this book gives both instrument readings (exposures) and doses in roentgens (R).
Ammonia.— This is a transparent, colorless gas, having an acrid taste and an exceedingly pungent smell. It is alkaline in reaction. The best publicly-known preparation containing this gas is aqua ammoniae or water of ammonia, a solution of 10 per cent. by weight of the gas in water. Death has been caused by inhalation of the gas, by ingestion of the liquid and by the muriate and carbonate. Fatal results have followed after the lapse of four minutes through spasm of the glottis. The same ending may occur after comparatively long periods as with other corrosive poisons, causing stricture or prolonged prostration.