Compressive strengths of the lime-slag cements prepared from slags of composition in the system CaO-Al2O3-SiO2 reported in Part I of the paper have been correlated statistically with relevant factors, such as degree of hydration of slags, amount of slag per briquette and fractional volume of the test briquettes occupied by lime, slag and sand. Degree of hydration and amount of slag per briquette were combined into one by multiplying them, the product being a measure of the amount of hydrated material present in a test piece. The final relation was found as (Image Presented) where C = compressive strength lb/in.2 Hm = product of degree of hydration of slag and amount of slag/briquette P = percent volume packed. © 1964 Taylor & Francis Group, LLC.