Precautions labour

Precautions in the Use of Nitrate Salt Baths, Min. of Labour, SHW booklet, London, HMSO, 1964... 

The presence of fouling on the surface of heat exchangers may be the cause of additional maintenance costs. The more obvious result of course, is the need to clean the heat exchanger to return it to efficient operation. Not only will this involve labour costs but it may require large quantities of cleaning chemicals and there may be effluent problems to be overcome that add to the cost. If the cleaning agents are hazardous or toxic, elaborate safety precautions with attendant costs. 

Majesty and of our holy Catholic Faith. By this precaution and labour your Majesty s service would be advanced, and those kingdoms would be guarded and secured, so that the enemies of our Holy Catholic Faith might not occupy them, as they might have hoped after having been successful in passing on one previous occasion. 

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