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Wode of Entrance

 

Inhalation of fumes or dust or swallowing with food or drink.
Symptoms

(a) Acute--conjunctivitis, eczema, ulcers.
{b) Chronic--Anemia, neuritis, degeneration of liver and kidneys.

Mercury

Sources

(a) Mercury mining and smelting

(>) Manufacture of barometers and thermometers
{c

} Hat making (felt)

Mode of Entrance

 

(a) Inhalation of vapor
(b) Skin
(c) Rarely by swallowing
Symptoms

{a} Anemia

{b) Headache ard dizziness

{c) Tremor

(a) “Ptyalism” (fetid breath, soft, swollen, ulcerated gums, with
loosening teeth)

(e) Enlarged glands.

Prevention--Same as for lead.

Phosphorus
Sources--Chiefly match making with white phosphorus.

Mode of Entrance--Swallowing

 

Symptoms

(a) Necrosis of bones of jaw
(b}) Foul odor of breath

Prevention

(a) Prohibition of use of white phosphorus
(b) Mouth hygiene

Carbon Monoxide--is the most important of all gas poisonings.

 

Sources

 

(a) Illuminating gas
{b) Exhaust from autos
{c} Blast furnaces

(ad) Mine gas