|
Searched The Knowledge Base for "lead tests"
|
Found 14 matches
|
|
|
|
|
|
|
|
The Romans found that the mixture of lime putty with pozzolana, a fine volcanic ash, would harden under water. The result was possibly the first hydraulic cement.
|
|
read more
|
|
|
|
|
|
|
Abrasive cleaning methods are responsible for causing a great deal of damage to historic building materials. To prevent indiscriminate use of these potentially harmful techniques, this brief has been prepared to explain abrasive cleaning methods, how they can be...
|
|
read more
|
|
|
|
|
|
|
If you have ever felt a sense of excitement and mystery going inside an old building--whether occupied or vacant--it is probably because its materials and features resonate with the spirit of past people and events. Yet excitement about the unknown is heightened...
|
|
read more
|
|
|
|
|
|
|
Cast iron played a pre-eminent role in the industrial development of our country during the 19th century. Cast-iron machinery filled America's
factories and made possible the growth of railroad transportation. Cast iron was used extensively in our cities for water systems and street lighting.
|
|
read more
|
|
|
|
|
|
|
|
Searched The Knowledge Base for "lead tests"
|
Found 14 matches
|
|
|
