376 Bibliography. 



olina and Georgia are omitted. Such omissions, however, will not ma- 

 terially interfere with its usefulness as a class-book, and they may be 

 readily supplied in a second edition. 



10. Report on the Manufacture of Iron, addressed to the governor 

 of Maryland, by J. W. Alexander, Topographical Engineer of the 

 state. Printed by order of the senate, 1840 ; 269 pp. 8vo, with plates 

 and tables. — We have already noticed the labors of Mr. Alexander in 

 the survey of the state of Maryland, (Vol. xxvii,) and we shall now 

 briefly mention the heads of the present important report. 



It is contained in four chapters. 



Chap. I. HiSTOKICAL RESEARCHES INTO THE MANUFACTURE OF IRON. 



Ninety two pages. 



Sect. 1. Ancient testimonies. 



Sect. 2. Modern history of the manufacture. 



Sect. 3. Researches into the manifacture in Maryland. 



Chap. II. Metallurgic and geographic distribution of the ores 

 OF IRON. Twenty one pages. 



1. Native iron. 2. Meteoric iron. 3. Magnetic iron ore. 4. 

 Specular iron. 5. Fibrous brown hcematite. 6. Carbonate of iron. 

 7, Silicated iron. 8. Titaniated iron ore. 



Chap. III. Means, machinery and materials ebiployed in the 

 MANUFACTURE OF IRON. Sixty eight pages. 



Sect. 1. Blast furnaces generally — their location, construction, ^c. 



Sect. 2. Cost of construction and permanence of blastfurnaces and 

 their accessories. 



Sect. 3. Of the materials used in blast furnaces — their method of 

 extraction and preparation, and their cost. 



Chap. IV. Principal chemical phenomena of the manufacture 

 OF IRON. Eighty four pages. 



Sect. 1. Exemplification of the general chemical theory of blast 

 furnaces. 



Sect. 2. Furnace cinder — its constitution and phenomena. 



Sect. 3. Characteristics and constitution of the metal produced under 

 v<xrious circumstances. 



Sect. 4. Gaseous materials and products accompanying the forma- 

 tion of crude iron^ 



It is obvious that this is an outline of a great work, and it is veiy ably 

 executed by Mr. Alexander. As he justly observes in another commu- 

 nication, this effort appears to be of general interest as marking an 

 epoch, when, in consequence of the conjoined exertions of those who 

 are devoted to the cause of science, the systematic protection and dif- 

 fusion of knowledge has come to be recognized as one of the import- 



