TRANSCRIBER'S NOTES Added table of contents to HTML version. Page 5: Added period to the sentence: "If the coal used in the test is to be analyzed, take a sample of from 4 to 6 pounds from each barrow and throw it into a box near the scales.". Page 11: Changed typo "calcuate" to "calculate." Page 18: Changed typo "1.1854" to "1.0854", see intersecting columns 184° F and 200 psi. Page 19: Changed typo "Samuel Sandford" to "Samuel Sanford."