The explanations prefixed to the Tables show the manner of 

 their construction, and enable any person who consults them to 

 extend or adapt them to the particular purpose he has in view. 



To render the Work still more useful, the occasional demands 

 of the landed interest have been attended to, by adding to the 

 portion more particularly designed for the Agriculturist, Tables 

 showing the number of Bricks required for any piece of Work, 

 the Content of Buildings, Slating, Thatching, and Flooring ; 

 also, the Solid Content of round or growing Trees, with remarks 

 on their Measurement. A Table is likewise given for Calculat- 

 ing Wages for days and hours, which will be found of much ser- 

 vice to those who employ many hands. To the whole is added 

 a brief Treatise on Land- Surveying. 



From the number, variety, and extent of the Tables, it is 

 believed that scarcely anything can occur in Farm calculations 

 for which they do not provide valuable assistance ; and the care 

 and labour bestowed on their compilation entitle them to the 

 confidence of the agricultural community. 



D. B. 



GLASGOW September, 1851. 



