88 Report oF DEPARTMENT OF BACTERIOLOGY OF THE 
TABLE IX.—CoOMPARISON OF Two LATE ForRMS OF RELIEF FILTERS. 





Filter, Plate VI, fig. 1. Filter, Plate VI, fig. 4. 
ret paid 3157 3158 3157 3158 
Cow Clay | Fancy | Millie | Ham- Clay | Fancy | Millie | Ham- 
Bt A. F. mondF. B. AY F, |mondF, 
Germs per cc. of milk. Germs per cc. of milk. 
May i280 hl tae ats 22203001) OAEOO) | cet aie Mee fe eo eh cee a ae ee *63 ,600 2,640 
Vt ADO emacs biel banwat lt Goal dene 3,800 165620. | 3,550) | 953005 © oS eee 
Jie “SPA, Gc) ee ae ee tee 2, 5504121050002 | 624'900 4) 3330 8\ teen ene 
TREN 2.810 173040 fiche eet ee eee ce eee 4,130 | 7,140 
Nae Poa eee tate arco Sealed v5 UAE ER Sy Ne A ,620: |.2163.410.2|43.,680° | 95 6105) eee ee 
pee eee et ee 5690-115; 5009 Be eat cee ere ee ee ee 3,500 | 10,500 
Su DRO E ecie teri Pee Race oles Alas aloo € 920.4] 422908) 4754909 0 oe ee 
pid MOE ene Bs Sot nine ta SEOLOAIPG SOOM) Beers All ke eiets Ria eee oa) ee 2,270 6,700 
IA VEGI ra ree aisle S090 1) OIOLOM es, O52 4) Waa Sel tomoOo mime tee 3,300 | 6,745 
Gen. average... 8,345 5, 267 
* Not in average. 
The results obtained from Millie F. on May 28 are not in- 
cluded in the average because in making the plates the sampie 
met with a slight accident and the results are plainly uet in 
accord with the remainder of the observations. 
It will be observed that with three of the cows the results — 
were slightly better on the average with the filter supplied with 
the cone but this difference was not marked:and probably lies 
within the range of variation which would be experienced in 
running the machine on two different nights. 
Placing cotton in the suction filter only.—The sole objection 
on the part of the dairymen to placing cotton in the filter 
cups arises from the fact that this cotton must be inserted 
carefully before each milking and time ifs consumed in the 
process. This was particularly true of machines No. 1287 
and 1288 where the care required in properly inserting the cot- 
ton was especially trying. With the later models the filter 
cups have been larger and the difficulties correspondingly less. 
In view of the marked influence of the suction filter as brought 
