98 Transactions of the American Institute. 



No. 838. Luhricators. — Holland & Cady. New York city. 



This is a regulating feed oil cup, and is provided with a glass reser- 

 Yoir. A tube passes up a certain distance in the reservoir, and is 

 provided with a through and through perforation for admitting the 

 oil to the tube ; a tliunib screw is arranged at the top of the tube, . 

 and the flow of oil into the tube is regulated by contracting the 

 diameter of the perforations by means of this thumb screw. It is 

 necessary to remove the tube from the reservoir whenever this thumb 

 screw is to be operated, in order to regulate the quantity of oil 

 delivered, and this is an indispensable feature in an oil cup. 



JSTo. 674. Liibricaior. — Nathan & Dreyfus, New York city. 



This is an automatic oil cup ; it is provided with a tubular stem, 

 into which is placed a rod, which is caused to rotate during the 

 revolution of the journal, and work do^on, as it were, the oil. The 

 size of the rod regulates the quantity delivered. The delivery of the 

 lubricating liquid is not kept up whilst the journal is at rest. The 

 reservoir is of glass alone, or of glass protected by a slotted metallic 

 frame. This lubricator is in general use throughout the country, and 

 is spoken of in the highest terras. 



We recommend that a first premium be awarded to Messrs. 

 Nathan & Dreyfus, for the best automatic lubricator. 



No. 972. Patent Oilers. — James E. Granniss, New York city. 



We do not regard these oilers as superior to many others in the 

 market. 



Tuyeres. 



No. 464. Hot Blast Water Tuyeres. — J. Bayliss, New York city. 



Mr. Bayliss' arrangement of tuyere is well calculated for the 

 requirements of a hot coke fire. But a central-blast tuyere is so 

 much better adapted to both large and small work, requires but 

 little attention, is durable, and has its blast heated by the hot coals 

 which drop within, that we cannot see any just cause for recommend- 

 ing this tuyere to the public, as being superior to all others. 



Air Pumps. 



Nos. 921 and 922. Air rumps. — John P. Gruber, New York 

 city. 



Upon due examination and trial, we found these air pumps to be 

 6im])le and very efficient, and eminently worthy of favorable con- 

 sideration. 



No. 368. Air Pumps. — Jaines Coleman & Co., New York city. 



