SOME ACCOUNT OF A NEW LEVEL. 



199 



from real practice in the ordinary routine of flower and kitchen 

 gardening. 



The Level I have invented combines the plumb-line and the 

 level in the same instrument, and that instrument so small as to 

 be got into the pocket ; with it a stake may be set upright in 

 any weather, and the vertical line determined instantly ; ten 

 observations may be made with this tool whilst the mason's 

 plumb-rule is being adjusted to make one ; and the same may be 

 said of the horizontal line, for it is no easy matter to get the 

 spirit-level accurately adjusted ; and that most valuable tool, the 

 mason's level, is miserably slow in its movements in all weathers, 

 and in windy weather it will not give a true line at all, whereas 

 this little implement not only tells instantly when the bed is 

 level on which it lies, but tells how far it is from that point in 

 case the bed be an inclined plane, thereby giving a regular fall 

 to drains, &c., where inclined planes are wanted. 



The Level is constructed upon the principle of the hour-glass, 

 and, by a particular character of sand, the lines are given very fine. 



The accompanying sketch will give an accurate idea of the 

 dial of the contrivance. No scale is needed, as the sketch is the 

 full size of the instrument. 



