CALCAREOUS MANURES— APPENDIX, 



235 



Ostrea Virginiana, Gmel. 

 " subfalcata. Con. 



Oliva litterrata, Lam. 



Pandora ciassidens. 



Panopaea reflexa. Say. 



Petricola ceiitenaria. Con. 



Plicatula marginata, Say. 



Pecten Jefiersonius, Say. 

 " Madisonius 

 " septeinnarius " 

 " decemnarius. Con. 

 " Virginianus, Con. 



Pecten Clintonius, Say. 



" eboreus, Con. 

 Pectunculus subovatus, Say. 



«' pulviuatus, Lam. 



Perna maxillata, " 



Pleurotoma ? 



Serpula ? 



Teredo ? 



Turritella, 



Venus Iridacnoides, Lam. 



" Rileyi, Con. 



" alveata, Con. 



Cardita planicosta. 

 Corbula Alabamienses, Lea, 



Crassatella ? 



Ostrea sellaeformis, Con. 

 " compressirostra, Con. 



Eocene. 



Pecten Lyel^i, Lea. 

 Panopaea oblongata, Con. 

 Rostellaria velala. " 

 Turritella Mortoni. 



Erratum in Professor Shepaid'a letter, p. 222, line 39, for " nutritive," read mwbrj-iu 



NOTE V. 



THE EARLIEST KNOWN SUCCESSFUL APPLICATIONS OF FOSSIL SHELLS AS MANDRB. 



The two old experiments described at page 70, though the only applica- 

 tions of fossil shells known to me previous to the commencement of my use 

 of this manure, were not all that had been made, and, which being deem- 

 ed failures, had been abandoned and forgotten. Another, within a few 

 miles of my residence, was brought to light and notice afterwards, by an 

 old negro, who was perhaps the only person then living who had any 

 knowledge of the facts. After I had found enough success in using this 

 manure to attract to it some attention, Mr. Thomas Cocke of Aberdeen was 

 one of those who began, but still with doubt and hesitation, to use marl 

 to some considerable extent. One of his early applications was to his 

 garden. The old gardener apposed this, and told his master that he knew 

 " the stuff was good for nothing, because, when he was a boy, his old 

 master (Mr. Cocke's father) had used some at Bonaccord, and it had never 

 done the least good." Being asked whether he could show the spot where 

 this trial had been made, he answered that he could easily, as he drove the 

 cart which carried out the marl. The place was immediately sought. 

 It was on the most elevated part of a very poor field, which had been clear- 

 ed and exhausted fully a century before. The marled space (a square of 

 about half an acre) though still poor, was at least twice as productive as 

 the surrounding land, though a slight manuring from the farm-yard had 

 been applied a few years before to the surrounding land, and omitted on 

 this spot, which was supposed, from its appearance, to have been the site 

 of some former dwelling house and yard, of which every trace had 

 disappeared except the permanent improvement of the soil usual fi'om that 

 cause. A close examination showed some fragments of the hardest shells 

 remaining, so as to prove that the old man had not mistaken the spot. 

 This, like other early applications, had been made on ground too poor for 

 the marl to show but very slight early effect; and as only one kind of opera- 

 tion of any manure was then thought of, (that which dung produces,) it is 

 not strange that both the master and servant should have agreed in the 

 opinion that the application was useless, and tl>at all persons who knew of 



