THE GYROSCOPE FOR MARINE PURPOSES. 155 



DISCUSSION. 



After the reading of his paper Mr. Sperry gave an exhibition of stereopticon 

 views illustrative of the paper, after which, by means of a model in the shape of 

 two tripods, with a pendulum beneath a small gyroscope, the paper was further 

 explained by the author. 



A Member:— In operation, is the gyroscope confined vertically? 



Mr. Sperry:— Oh no. It is pendulus and holds the plane of the axis of the 



earth with great accuracy. 



I will now show you the model. (Illustrates by the use of the model.) 



The conclusion of the paper and stereopticon views was received with great 



applause. 



The Chairman:— I certainly think, gentlemen, this paper deserves a hearty 

 vote of thanks, and on behalf of the Society I tender the same to Mr. Sperry, and 

 we stand adjourned until 2 o'clock this afternoon. 



Afternoon Session. l - ' 



The Chairman called the meeting to order at 2.15. 



The Chairman:— I think, gentlemen, that we have rarely heard a more 

 interesting paper than that of Mr. Sperry on the gyroscope and in your behalf I 

 wish to renew our thanks to Mr. Sperry for his excellent illustrations. 



The next paper is now before you, "Comparative Results in Steam and Coal 

 Consumption with Turbines, Reciprocating Engines and a Combination of the 

 Two on the Steam Yacht Vanadis," by Mr. CHnton H. Crane, Member. 



