192 



NOTICE TO SUBSCRIBERS. 



weeks had the same appearance as when 

 preserved in brandy. — ib. 



EMPLOYMENT OF MINERAL TAR, OR PY- 

 ROLIGNEOUS LIQUOR, FOR THE PRO 

 TECTION OF WALLS OF MASONRY OR 

 OF MITD. 



When the walls are thoroughly dry, to- 

 wards the end of summer, (having pre- 

 viously been either newly builtor put into 

 a new state of thorough repair,) they are to 

 be coated over once, twice, or thrice with 

 the tar. The last coat, immediately 

 when put on, may be powdered with 

 sand ; and this when solidified, may be 

 white-washed. 



In France, earthen walls, and the walls 

 of court yards, and terraces, are treated 

 in this manner, and so rendered of great 

 durability. Farmer'' s Register. 



PREVENTION OF DRY ROT IN TIMBER. 



The gas of the kreosote, (supposed 

 creosote,) procured from the distillation 

 of coal or vegetable tar, which, when 

 driven off in the shape of gas, will pene- 

 trate every part of the largest logs, and 

 render the wood almost as hard as iron; 

 so hard indeed, as not to be easily 

 worked. It is understood that in Bel- 

 glum they are using it as blocks for the 

 rail-roads. The worm, {teredo navalis) 

 as proved at Sheerness, will not touch it, 

 while pieces of the same wood, steeped. 

 in corrosive sublimate, sulphurous acid, 

 and other active solutions, were bored 

 through and through. ib. 



TIME FOR SOWING- SEEDS OF DIFFERENT 

 KINDS. 



As it is admitted that, the duly adjust- 

 ing the periods of sowing seeds for dif- 

 ferent kinds of crops, according to the 

 forwardness of the season is of great im- 

 portance in agriculture, and as the tem- 

 perature is far from being the same in 

 different seasons, at the same period of 



the year, it is thought best to adopt the 

 budding and leafing of trees as a standard 

 for determining the most proper period. 

 The budding and leafing of the birch, is 

 said to be considered in Sweden as a di- 

 rectory for sowing barley, and it is record- 

 ed in the t^moritates ,/3cademico, ihat the 

 illustrious Linnaeus exhorted his coun- 

 trymen to observe with care what time 

 each tree expands its buds, as information 

 which might lead to the most useful pur- 

 poses. For tliese reasons the prudent 

 husbandman is advised to watch the bud- 

 ding of trees, and to collect from this 

 circumstance the proper time for sowing, 

 and to make the operations of nature a 

 calender for his own labors, and it is con- 

 tended that more favorable crops than 

 would otherwise be obtained will amply' 

 reward his diligence. 



NOTICE TO SUBSCRIBERS. 

 A description of Witherow and Peirce's 

 Cycloidal Plough, will appear in a future 

 number. 



This number completes the first year 

 of the Observer and Record of Jigricul- 

 ture, Science, and Art. 



An alphabetical table of contents, or 

 index, accompanies the number; this 

 will enable each subscriber to have the 

 volume bound. Those who think pro- 

 per to leave their numbers with T. E. 

 Chapman, No. 74 North Fourth street, 

 can have them bound in a good substan- 

 tial manner, and at a moderate expense. 



Subscribers for the second volume can 

 also have the first, either in numbers 

 alone, or bound. 



Subscribers and Postmasters are most 

 respectfully requested to act as r gents for 

 the work. 



See prospectus, for object, plan, and 

 terms. 



The second volume will commence 

 early in October. 



Editor. 



CONTENTS OF NO. 12. VOL. I. 



On Bleaching Silk, 177 



Sir. H. Davy's Agricultural Chemistry, . 179 

 Definition of Terms. Letter J. . . . 182 



On Smut in Wheat, Ib6 



Remarks upon the Teeth or Cogs of Wheels, show- 

 ing the proper form to be given to their Act- 

 ing Sides or Faces, . . . . 1 89 

 Flame of Hydrogen Rendered Luminous, . 191 



OF OBSERVER AND RECORD. 



Preservation of Fruits by Carbonic Acid Gas, 191 

 Employment of Mineral Tar, or Pyroiigneous Li- 

 quor, for the Protection of Walls of Masonry 



or of Mud 192 



Prevention of Dry Rot in Timber, . . 192 

 Time for Sowing Seeds of different kinds, . 192 

 Notice to Subscribers, , . . . 1-2 



