UNITED STATES
            SECURITIES & EXCHANGE COMMISSION
                 Washington, D.C. 20549
                           Form 13F
                     Form 13F COVER PAGE


 Report for the Calendar Year or Quarter Ended            June 30, 2007

 Check here if Amendment [       ];    Amendment Number:

 This amendment (Check only one.) :          [     ] is a restatement
 [     ] adds new holdings entries.

 Institutional Investment Manager Filing this Report:
 Name:          Petroleum & Resources Corporation
 Address:       7 St. Paul Street, Suite 1140
                Baltimore, MD  21202

 Form 13F File Number:      28-596


 The institutional investment manager filing this report and the person
 by whom it is signed hereby represent that the person signing the
 report is authorized to submit it, that all information contained
 herein is true, correct and complete, and that it is understood that
 all required items, statements, schedules, lists,and tables, are
 considered integral parts of this form.



 Person Signing this Report on Behalf of Reporting Manager:



 Name:        Christine M. Sloan
 Title:       Assistant Treasurer
 Phone:       (410) 752-5900

 Signature, Place, and Date of Signing:

 Christine M. Sloan            Baltimore, MD            July  31, 2007

   [Signature]                 [City, State]               [Date]



 Report Type (Check only one.):

 [X]   13F HOLDINGS REPORT.  (Check here if all holdings of this reporting
 manager are reported in this report.)

 [ ]   13F NOTICE.  (Check here if no holdings reported
 are in this report, and all holdings are reported by other

 [ ]   13F COMBINATION REPORT.  (Check here if a portion of the holdings
 for this reporting manager are reported in this report and a portion are
 reported by other reporting manager (s).)


 List of Other Managers Reporting for this Manager:
 Form 13F File Number Name
 28

 [Repeat as necessary.]



 Form 13F SUMMARY PAGE
 Report Summary:

 Number of Other Included Managers:           0

 Form 13F Information Table Entry Total:      47

 Form 13F Information Table Value Total:      $      858,067
                                                        (in thousands)

 List of Other Included Managers:

 Provide a numbered list of the name (s) and Form 13F file number(s)
 of all institutional investment managers with respect to which this
 report is filed, other than the manager filing this report.




 [If there are no entries in this list, state "NONE" and omit the column
 headings and list entries.]


 No.       Form 13-F File No.     Name
           28-

 [Repeat as necessary.]

 
 
 

        COLUMN 1          COLUMN 2   COLUMN 3  COLUMN 4       COLUMN 5     COLUMN 6COLUMN 7     COLUMN 8
    NAME OF ISSUER    TITLE OF CLASS   CUSIP  VALUE IN  SHARES/PRN SH/ PUT/ INVSTM  OTHER   VOTING AUTHORITY
                                                000's    AMOUNT    PRN CALLDISCRETNMANAGERS
                                                                                            SOLE SHARED NONE
                                                                       

 AGL RESOURCES INC.         COM      001204106  6,882     170,000  SH       SOLE           170,000
 AIR PRODUCTS & CHEMICA     COM      009158106  9,242     115,000  SH       SOLE           115,000
 APACHE CORP.               COM      037411105  12,907    158,200  SH       SOLE           158,200
 AQUA AMERICA, INC.         COM      03836W103  6,320     281,000  SH       SOLE           281,000
 BAKER HUGHES, INC..        COM      057224107  17,247    205,000  SH       SOLE           205,000
 BJ SERVICES CO.            COM      055482103  6,826     240,000  SH       SOLE           240,000
 BRONCO DRILLING CO INC     COM      112211107  3,938     240,000  SH       SOLE           240,000
 CHEVRON CORP.              COM      166764100  54,756    650,000  SH       SOLE           650,000
 CONOCOPHILLIPS             COM      20825C104  43,716    556,891  SH       SOLE           556,891
 DEVON ENERGY CORP.         COM      25179M103  25,836    330,000  SH       SOLE           330,000
 DUKE ENERGY CORP.          COM      26441C105  3,983     217,624  SH       SOLE           217,624
 DUPONT EI DE NEMOURS       COM      263534109  8,007     157,500  SH       SOLE           157,500
 ENERGEN CORP.              COM      29265N108  21,976    400,000  SH       SOLE           400,000
 ENSCO INTERNATIONAL, I     COM      26874Q100  12,760    209,150  SH       SOLE           209,150
 EOG RESOURCES INC.         COM      26875P101  22,649    310,000  SH       SOLE           310,000
 EQUITABLE RESOURCES IN     COM      294549100  22,302    450,000  SH       SOLE           450,000
 EXXON MOBIL CORP.          COM      30231G102 104,431   1,245,000 SH       SOLE          1,245,000
 FLORIDA ROCK INDUSTRIE     COM      341140101  7,087     105,000  SH       SOLE           105,000
 FOREST OIL CORP            COM      346091705  1,564      37,000  SH       SOLE           37,000
 GENERAL ELECTRIC CO.       COM      369604103  17,410    454,800  SH       SOLE           454,800
 GLOBALSANTAFE CORP.        COM      G3930E101  20,952    290,000  SH       SOLE           290,000
 GRANT PRIDECO INC          COM      38821G101  16,580    308,000  SH       SOLE           308,000
 HERCULES OFFSHORE, INC     COM      427093109  8,095     250,000  SH       SOLE           250,000
 HESS CORPORATION           COM      42809H107  11,497    195,000  SH       SOLE           195,000
 MARATHON OIL CO.           COM      565849106  14,390    240,000  SH       SOLE           240,000
 MDU RESOURCES GROUP, I     COM      552690109  10,515    375,000  SH       SOLE           375,000
 MURPHY OIL CORP.           COM      626717102  12,869    216,500  SH       SOLE           216,500
 NABORS INDUSTRIES, LTD     COM      G6359F103  17,358    520,000  SH       SOLE           520,000
 NATIONAL FUEL GAS CO.      COM      636180101  8,662     200,000  SH       SOLE           200,000
 NEW JERSEY RESOURCES C     COM      646025106  10,204    200,000  SH       SOLE           200,000
 NEWFIELD EXPLORATION C     COM      651290108  7,971     175,000  SH       SOLE           175,000
 NOBLE CORP                 COM      G65422100  19,504    200,000  SH       SOLE           200,000
 NOBLE ENERGY INC.          COM      655044105  26,828    430,000  SH       SOLE           430,000
 OCCIDENTAL PETROLEUM C     COM      674599105  23,152    400,000  SH       SOLE           400,000
 QUESTAR CORP               COM      748356102  19,026    360,000  SH       SOLE           360,000
 ROHM & HAAS CO.            COM      775371107  10,936    200,000  SH       SOLE           200,000
 ROYAL DUTCH SHELL PLC-SPONSORED ADRA780259206  21,518    265,000  SH       SOLE           265,000
 SCHLUMBERGER LTD           COM      806857108  47,566    560,000  SH       SOLE           560,000
 SEMCO ENERGY INC.          COM      78412D109  5,208     670,300  SH       SOLE           670,300
 SPECTRA ENERGY CORP.       COM      847560109  2,825     108,812  SH       SOLE           108,812
 SUNCOR ENERGY              COM      867229106  8,992     100,000  SH       SOLE           100,000
 TODCO                      COM      88889T107  9,442     200,000  SH       SOLE           200,000
 TOTAL S.A.             SPONSORED ADR89151E109  17,816    220,000  SH       SOLE           220,000
 VALERO ENERGY CORP.        COM      91913Y100  31,390    425,000  SH       SOLE           425,000
 WEATHERFORD INT'L. LTD     COM      G95089101  27,264    493,560  SH       SOLE           493,560
 WILLIAMS COMPANIES, IN     COM      969457100  14,229    450,000  SH       SOLE           450,000
 XTO ENERGY                 COM      98385X106  23,439    390,000  SH       SOLE           390,000
                                                858,067