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Is picric acid poisonous?

Is picric acid poisonous? As a last consideration, Picric Acid is toxic. Ingestion of 1-2 grams would cause severe poisoning. The dust is irritating to the skin and eye. A peculiar effect on the eye is “yellow” tainted vision. Why Read more…

How are railroads inspected?

How are railroads inspected? Current regulations require ultrasonic rail test vehicles to repeatedly stop and manually inspect to verify indication of defects within four hours. This frequent starting and stopping can require trains operating in the vicinity to travel at Read more…

What time was the Age of Reason?

What time was the Age of Reason? 18th century The Enlightenment – the great ‘Age of Reason’ – is defined as the period of rigorous scientific, political and philosophical discourse that characterised European society during the ‘long’ 18th century: from Read more…