MOLE. 



45,-. 



E. M. HAMILTON & C. N. EAEL. 



Apparatus for Making and Laying Continuous 



Concrete-Pipe. 



No. 220.757. 



Patented Oct. 21, 1879 





(Ho Hnilel.) 



W. HAMLET, 

 Macliine for Formiag and Laying Continuous Drain 



Pipes, 

 No. 231.908. Patented Sept. 7. 1880. 



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No. 269,246. 



W. T. WASSOK. 



DITOHINQ UACEISE. 



Patented Jnne 6, 1882. 



(Model.) 



A. S. HUGHES. 



DITOHINO iFD TILE LAYIBB H40HINE. 



Ho. 265,086. Patented Sept. 26, 1882. 



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