narrant vafa terrea incus glaberrima, atque aqu 

 repleca ad cerrae fuperficiem colloeata, acque 

 ita palea, cui esca imponerecur , tecca, uc mures 

 Jianc comedere non posfent absque eo, uc in 

 aquam caderenc et perirenc. Simili fere metho- 

 do, anno 1805, imprimis ufi func in Hollandia 

 fepcentrionali, ec quidem in pagis Urzen ec 

 Bcrkhout. Scilicec cerebrae quadam fpecie hunc 

 in finem paratae fcrobes effbdiebann tres fere pol- 

 Jices in diamecro latas arque ica alcas, uc aqua in 

 iino appareret ; in quas incurrences mures aquis 

 peribanc; qud ratione plures agros rice a muribus 

 liberarunc (^i). Haec aucem methodus, "licet 

 ibi fan's facilis, in edicioribus locis nullo modo 

 adhiberi posfe unicuique pacer. 



Eadem fere racione agricolae in German!! 

 fcrobes perpendicuJares effosferunc, in direccio* 

 ne canalium per quos mures currere folenc 5 qua* 

 rum parieces incus admodum glabras fecerunr, 

 ita uc mures in illas incidences exire nequeanc, 

 ec fie ab agricohl facile occidantur, Haec me- 

 thodus (implex licec facisque facilis, experimen- 

 tis taraen ukerius confirmanda videcur, Dispo- 

 fueruncquoque in sgris fascicules paleae, bacillo 



af- 



(i) Conf. J, Kops, Magazijn yan Landbouw , 

 II. p. 



